20665032 has 16 divisors (see below), whose sum is σ = 51662640. Its totient is φ = 6888336.

The previous prime is 20665019. The next prime is 20665033. The reversal of 20665032 is 23056602.

It is a super-2 number, since 2×20665032² = 854087095122048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 861043 = 20665032 / (2 + 0 + 6 + 6 + 5 + 0 + 3 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 20664993 and 20665011.

It is not an unprimeable number, because it can be changed into a prime (20665033) 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, 430498 + ... + 430545.

It is an arithmetic number, because the mean of its divisors is an integer number (3228915).

Almost surely, 2^20665032 is an apocalyptic number.

It is an amenable number.

20665032 is an abundant number, since it is smaller than the sum of its proper divisors (30997608).

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

20665032 is a wasteful number, since it uses less digits than its factorization.

20665032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861052 (or 861048 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20665032 is about 4545.8807727436. The cubic root of 20665032 is about 274.4176414580.

The spelling of 20665032 in words is "twenty million, six hundred sixty-five thousand, thirty-two".