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13021431234 = 2371916317583
BaseRepresentation
bin11000010000010001…
…10100010111000010
31020121111010020120220
430020020310113002
5203131441244414
65552034243510
7640453224240
oct141010642702
936544106526
1013021431234
115582293019
122634a26596
1312c69666c6
148b7547790
15513286ca9
hex3082345c2

13021431234 has 32 divisors (see below), whose sum is σ = 31329761280. Its totient is φ = 3524597712.

The previous prime is 13021431221. The next prime is 13021431257. The reversal of 13021431234 is 43213412031.

Adding to 13021431234 its reverse (43213412031), we get a palindrome (56234843265).

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8157994 + ... + 8159589.

It is an arithmetic number, because the mean of its divisors is an integer number (979055040).

Almost surely, 213021431234 is an apocalyptic number.

13021431234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

13021431234 is an abundant number, since it is smaller than the sum of its proper divisors (18308330046).

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

13021431234 is a wasteful number, since it uses less digits than its factorization.

13021431234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16317614.

The product of its (nonzero) digits is 1728, while the sum is 24.

The spelling of 13021431234 in words is "thirteen billion, twenty-one million, four hundred thirty-one thousand, two hundred thirty-four".

Divisors: 1 2 3 6 7 14 19 21 38 42 57 114 133 266 399 798 16317583 32635166 48952749 97905498 114223081 228446162 310034077 342669243 620068154 685338486 930102231 1860204462 2170238539 4340477078 6510715617 13021431234