20917532 has 12 divisors (see below), whose sum is σ = 36708000. Its totient is φ = 10429536.

The previous prime is 20917517. The next prime is 20917553. The reversal of 20917532 is 23571902.

It is a junction number, because it is equal to n+sod(n) for n = 20917495 and 20917504.

It is a congruent number.

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, 5657 + ... + 8592.

It is an arithmetic number, because the mean of its divisors is an integer number (3059000).

Almost surely, 2^20917532 is an apocalyptic number.

It is an amenable number.

20917532 is a deficient number, since it is larger than the sum of its proper divisors (15790468).

20917532 is a wasteful number, since it uses less digits than its factorization.

20917532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14620 (or 14618 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 20917532 is about 4573.5688471914. The cubic root of 20917532 is about 275.5307963022.

The spelling of 20917532 in words is "twenty million, nine hundred seventeen thousand, five hundred thirty-two".