20913232 has 10 divisors (see below), whose sum is σ = 40519418. Its totient is φ = 10456608.

The previous prime is 20913229. The next prime is 20913271. The reversal of 20913232 is 23231902.

It can be written as a sum of positive squares in only one way, i.e., 11451456 + 9461776 = 3384^2 + 3076^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653523 + ... + 653554.

Almost surely, 2^20913232 is an apocalyptic number.

It is an amenable number.

20913232 is a deficient number, since it is larger than the sum of its proper divisors (19606186).

20913232 is a wasteful number, since it uses less digits than its factorization.

20913232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307085 (or 1307079 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 20913232 is about 4573.0987306202. The cubic root of 20913232 is about 275.5119147946.

The spelling of 20913232 in words is "twenty million, nine hundred thirteen thousand, two hundred thirty-two".