20648874 has 16 divisors (see below), whose sum is σ = 41392512. Its totient is φ = 6867168.

The previous prime is 20648861. The next prime is 20648891. The reversal of 20648874 is 47884602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 939 + ... + 6494.

It is an arithmetic number, because the mean of its divisors is an integer number (2587032).

Almost surely, 2^20648874 is an apocalyptic number.

20648874 is an abundant number, since it is smaller than the sum of its proper divisors (20743638).

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

20648874 is a wasteful number, since it uses less digits than its factorization.

20648874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7901.

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 20648874 is about 4544.1032118560. The cubic root of 20648874 is about 274.3461003733.

The spelling of 20648874 in words is "twenty million, six hundred forty-eight thousand, eight hundred seventy-four".