20655532 has 6 divisors (see below), whose sum is σ = 36147188. Its totient is φ = 10327764.

The previous prime is 20655529. The next prime is 20655553. The reversal of 20655532 is 23555602.

It is a self number, because there is not a number n which added to its sum of digits gives 20655532.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2581938 + ... + 2581945.

Almost surely, 2^20655532 is an apocalyptic number.

It is an amenable number.

20655532 is a deficient number, since it is larger than the sum of its proper divisors (15491656).

20655532 is a wasteful number, since it uses less digits than its factorization.

20655532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5163887 (or 5163885 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 20655532 is about 4544.8357506075. The cubic root of 20655532 is about 274.3755838220.

The spelling of 20655532 in words is "twenty million, six hundred fifty-five thousand, five hundred thirty-two".