20657532 has 48 divisors (see below), whose sum is σ = 56870912. Its totient is φ = 5711040.

The previous prime is 20657491. The next prime is 20657537. The reversal of 20657532 is 23575602.

It is a self number, because there is not a number n which added to its sum of digits gives 20657532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20657537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1363 + ... + 6570.

Almost surely, 2^20657532 is an apocalyptic number.

It is an amenable number.

20657532 is an abundant number, since it is smaller than the sum of its proper divisors (36213380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20657532 is a wasteful number, since it uses less digits than its factorization.

20657532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7978 (or 7976 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 20657532 is about 4545.0557752353. The cubic root of 20657532 is about 274.3844391327.

The spelling of 20657532 in words is "twenty million, six hundred fifty-seven thousand, five hundred thirty-two".