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31020443434 = 2711997109391
BaseRepresentation
bin11100111000111101…
…100110011100101010
32222001212102210121101
4130320331212130222
51002012213142214
622130043432014
72145500263411
oct347075463452
988055383541
1031020443434
1112179260312
12601882560a
132c0490c496
141703b98478
15c184e7774
hex738f6672a

31020443434 has 16 divisors (see below), whose sum is σ = 47210086656. Its totient is φ = 15283970800.

The previous prime is 31020443429. The next prime is 31020443437. The reversal of 31020443434 is 43434402013.

It is not an unprimeable number, because it can be changed into a prime (31020443437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228879 + ... + 338269.

It is an arithmetic number, because the mean of its divisors is an integer number (2950630416).

Almost surely, 231020443434 is an apocalyptic number.

31020443434 is a deficient number, since it is larger than the sum of its proper divisors (16189643222).

31020443434 is a wasteful number, since it uses less digits than its factorization.

31020443434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111461.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 31020443434 its reverse (43434402013), we get a palindrome (74454845447).

The spelling of 31020443434 in words is "thirty-one billion, twenty million, four hundred forty-three thousand, four hundred thirty-four".

Divisors: 1 2 71 142 1997 3994 109391 141787 218782 283574 7766761 15533522 218453827 436907654 15510221717 31020443434