18406936652 has 12 divisors (see below), whose sum is σ = 34689996096. Its totient is φ = 8495509200.

The previous prime is 18406936651. The next prime is 18406936663. The reversal of 18406936652 is 25663960481.

It is a self number, because there is not a number n which added to its sum of digits gives 18406936652.

It is not an unprimeable number, because it can be changed into a prime (18406936651) 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, 176989724 + ... + 176989827.

It is an arithmetic number, because the mean of its divisors is an integer number (2890833008).

Almost surely, 2^18406936652 is an apocalyptic number.

It is an amenable number.

18406936652 is a deficient number, since it is larger than the sum of its proper divisors (16283059444).

18406936652 is a wasteful number, since it uses less digits than its factorization.

18406936652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353979568 (or 353979566 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 18406936652 in words is "eighteen billion, four hundred six million, nine hundred thirty-six thousand, six hundred fifty-two".