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.

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, 2^13021431234 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.

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

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