20507632 has 10 divisors (see below), whose sum is σ = 39733568. Its totient is φ = 10253808.

The previous prime is 20507629. The next prime is 20507653. The reversal of 20507632 is 23670502.

It is a junction number, because it is equal to n+sod(n) for n = 20507597 and 20507606.

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, 640848 + ... + 640879.

Almost surely, 2^20507632 is an apocalyptic number.

It is an amenable number.

20507632 is a deficient number, since it is larger than the sum of its proper divisors (19225936).

20507632 is a wasteful number, since it uses less digits than its factorization.

20507632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281735 (or 1281729 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 20507632 is about 4528.5353040470. The cubic root of 20507632 is about 273.7191431898.

The spelling of 20507632 in words is "twenty million, five hundred seven thousand, six hundred thirty-two".