20149928 has 16 divisors (see below), whose sum is σ = 37829760. Its totient is φ = 10062000.

The previous prime is 20149891. The next prime is 20149931. The reversal of 20149928 is 82994102.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

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 3 ways as a sum of consecutive naturals, for example, 9353 + ... + 11303.

It is an arithmetic number, because the mean of its divisors is an integer number (2364360).

Almost surely, 2^20149928 is an apocalyptic number.

It is an amenable number.

20149928 is a deficient number, since it is larger than the sum of its proper divisors (17679832).

20149928 is a wasteful number, since it uses less digits than its factorization.

20149928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3248 (or 3244 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 20149928 is about 4488.8671176590. The cubic root of 20149928 is about 272.1183524743.

The spelling of 20149928 in words is "twenty million, one hundred forty-nine thousand, nine hundred twenty-eight".