13257943890 has 32 divisors (see below), whose sum is σ = 31867839936. Its totient is φ = 3530032320.

The previous prime is 13257943847. The next prime is 13257943913. The reversal of 13257943890 is 9834975231.

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, 318796 + ... + 357975.

It is an arithmetic number, because the mean of its divisors is an integer number (995869998).

Almost surely, 2^13257943890 is an apocalyptic number.

13257943890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13257943890 is an abundant number, since it is smaller than the sum of its proper divisors (18609896046).

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

13257943890 is a wasteful number, since it uses less digits than its factorization.

13257943890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677434.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 13257943890 in words is "thirteen billion, two hundred fifty-seven million, nine hundred forty-three thousand, eight hundred ninety".