13521046638 has 32 divisors (see below), whose sum is σ = 30000481920. Its totient is φ = 4027840160.

The previous prime is 13521046573. The next prime is 13521046657. The reversal of 13521046638 is 83664012531.

It is a super-2 number, since 2×13521046638² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13521046596 and 13521046605.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1732245 + ... + 1740032.

It is an arithmetic number, because the mean of its divisors is an integer number (937515060).

Almost surely, 2^13521046638 is an apocalyptic number.

13521046638 is an abundant number, since it is smaller than the sum of its proper divisors (16479435282).

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

13521046638 is a wasteful number, since it uses less digits than its factorization.

13521046638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3472352.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 13521046638 in words is "thirteen billion, five hundred twenty-one million, forty-six thousand, six hundred thirty-eight".