20461868 has 12 divisors (see below), whose sum is σ = 40923792. Its totient is φ = 8769360.

The previous prime is 20461853. The next prime is 20461913. The reversal of 20461868 is 86816402.

20461868 is an admirable number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365363 + ... + 365418.

It is an arithmetic number, because the mean of its divisors is an integer number (3410316).

Almost surely, 2^20461868 is an apocalyptic number.

20461868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20461868 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20461868 is a wasteful number, since it uses less digits than its factorization.

20461868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730792 (or 730790 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 20461868 is about 4523.4796340870. The cubic root of 20461868 is about 273.5153847012.

The spelling of 20461868 in words is "twenty million, four hundred sixty-one thousand, eight hundred sixty-eight".