18864540932 has 12 divisors (see below), whose sum is σ = 33157109580. Its totient is φ = 9391081056.

The previous prime is 18864540911. The next prime is 18864540967. The reversal of 18864540932 is 23904546881.

It can be written as a sum of positive squares in 2 ways, for example, as 18201787396 + 662753536 = 134914^2 + 25744^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10296323 + ... + 10298154.

It is an arithmetic number, because the mean of its divisors is an integer number (2763092465).

Almost surely, 2^18864540932 is an apocalyptic number.

It is an amenable number.

18864540932 is a deficient number, since it is larger than the sum of its proper divisors (14292568648).

18864540932 is a wasteful number, since it uses less digits than its factorization.

18864540932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20594710 (or 20594708 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 18864540932 in words is "eighteen billion, eight hundred sixty-four million, five hundred forty thousand, nine hundred thirty-two".