20218579532 has 12 divisors (see below), whose sum is σ = 36205363656. Its totient is φ = 9874189920.

The previous prime is 20218579531. The next prime is 20218579547. The reversal of 20218579532 is 23597581202.

It is not an unprimeable number, because it can be changed into a prime (20218579531) 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, 58774769 + ... + 58775112.

It is an arithmetic number, because the mean of its divisors is an integer number (3017113638).

Almost surely, 2^20218579532 is an apocalyptic number.

It is an amenable number.

20218579532 is a deficient number, since it is larger than the sum of its proper divisors (15986784124).

20218579532 is a wasteful number, since it uses less digits than its factorization.

20218579532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117549928 (or 117549926 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 20218579532 in words is "twenty billion, two hundred eighteen million, five hundred seventy-nine thousand, five hundred thirty-two".