20672528 has 20 divisors (see below), whose sum is σ = 41031228. Its totient is φ = 10083840.

The previous prime is 20672501. The next prime is 20672537. The reversal of 20672528 is 82527602.

It can be written as a sum of positive squares in 2 ways, for example, as 350464 + 20322064 = 592^2 + 4508^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20672494 and 20672503.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15101 + ... + 16412.

Almost surely, 2^20672528 is an apocalyptic number.

It is an amenable number.

20672528 is a deficient number, since it is larger than the sum of its proper divisors (20358700).

20672528 is a wasteful number, since it uses less digits than its factorization.

20672528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31562 (or 31556 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 20672528 is about 4546.7051806775. The cubic root of 20672528 is about 274.4508180494.

The spelling of 20672528 in words is "twenty million, six hundred seventy-two thousand, five hundred twenty-eight".