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13123320620 = 2251315008901
BaseRepresentation
bin11000011100011010…
…11111101100101100
31020212120211202112212
430032031133230230
5203334032224440
610010114145552
7643131245654
oct141615375454
936776752485
1013123320620
115624855023
122662b822b8
131311abc197
148c6cab364
1551c1b1465
hex30e35fb2c

13123320620 has 24 divisors (see below), whose sum is σ = 27769352688. Its totient is φ = 5209256000.

The previous prime is 13123320607. The next prime is 13123320659. The reversal of 13123320620 is 2602332131.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2501831 + ... + 2507070.

It is an arithmetic number, because the mean of its divisors is an integer number (1157056362).

Almost surely, 213123320620 is an apocalyptic number.

13123320620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13123320620 is an abundant number, since it is smaller than the sum of its proper divisors (14646032068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13123320620 is a wasteful number, since it uses less digits than its factorization.

13123320620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5009041 (or 5009039 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 13123320620 its reverse (2602332131), we get a palindrome (15725652751).

The spelling of 13123320620 in words is "thirteen billion, one hundred twenty-three million, three hundred twenty thousand, six hundred twenty".

Divisors: 1 2 4 5 10 20 131 262 524 655 1310 2620 5008901 10017802 20035604 25044505 50089010 100178020 656166031 1312332062 2624664124 3280830155 6561660310 13123320620