20672520 has 64 divisors (see below), whose sum is σ = 67659840. Its totient is φ = 5011200.

The previous prime is 20672501. The next prime is 20672537. The reversal of 20672520 is 2527602.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6511 + ... + 9150.

It is an arithmetic number, because the mean of its divisors is an integer number (1057185).

Almost surely, 2^20672520 is an apocalyptic number.

20672520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20672520 is an abundant number, since it is smaller than the sum of its proper divisors (46987320).

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

20672520 is a wasteful number, since it uses less digits than its factorization.

20672520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15686 (or 15682 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20672520 is about 4546.7043009195. The cubic root of 20672520 is about 274.4507826464.

The spelling of 20672520 in words is "twenty million, six hundred seventy-two thousand, five hundred twenty".