20275880 has 32 divisors (see below), whose sum is σ = 47606400. Its totient is φ = 7757376.

The previous prime is 20275877. The next prime is 20275909. The reversal of 20275880 is 8857202.

It is a super-2 number, since 2×20275880² = 822222619548800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 10100 + ... + 11939.

It is an arithmetic number, because the mean of its divisors is an integer number (1487700).

Almost surely, 2^20275880 is an apocalyptic number.

20275880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20275880 is an abundant number, since it is smaller than the sum of its proper divisors (27330520).

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

20275880 is a wasteful number, since it uses less digits than its factorization.

20275880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22073 (or 22069 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 20275880 is about 4502.8746373844. The cubic root of 20275880 is about 272.6841557427.

The spelling of 20275880 in words is "twenty million, two hundred seventy-five thousand, eight hundred eighty".