20907632 has 20 divisors (see below), whose sum is σ = 41451960. Its totient is φ = 10210368.

The previous prime is 20907631. The next prime is 20907643. The reversal of 20907632 is 23670902.

It is a junction number, because it is equal to n+sod(n) for n = 20907595 and 20907604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20907631) 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, 14507 + ... + 15882.

It is an arithmetic number, because the mean of its divisors is an integer number (2072598).

Almost surely, 2^20907632 is an apocalyptic number.

It is an amenable number.

20907632 is a deficient number, since it is larger than the sum of its proper divisors (20544328).

20907632 is a wasteful number, since it uses less digits than its factorization.

20907632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30440 (or 30434 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 20907632 is about 4572.4864133204. The cubic root of 20907632 is about 275.4873210437.

The spelling of 20907632 in words is "twenty million, nine hundred seven thousand, six hundred thirty-two".