13756021732 has 12 divisors (see below), whose sum is σ = 24197770156. Its totient is φ = 6842373120.

The previous prime is 13756021667. The next prime is 13756021739. The reversal of 13756021732 is 23712065731.

It can be written as a sum of positive squares in 2 ways, for example, as 1941636096 + 11814385636 = 44064^2 + 108694^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13756021691 and 13756021700.

It is not an unprimeable number, because it can be changed into a prime (13756021739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8908569 + ... + 8910112.

Almost surely, 2^13756021732 is an apocalyptic number.

It is an amenable number.

13756021732 is a deficient number, since it is larger than the sum of its proper divisors (10441748424).

13756021732 is a wasteful number, since it uses less digits than its factorization.

13756021732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17818878 (or 17818876 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 37.

The spelling of 13756021732 in words is "thirteen billion, seven hundred fifty-six million, twenty-one thousand, seven hundred thirty-two".