20425880 has 32 divisors (see below), whose sum is σ = 46375200. Its totient is φ = 8096256.

The previous prime is 20425879. The next prime is 20425883. The reversal of 20425880 is 8852402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20425883) by changing a digit.

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, 2261 + ... + 6779.

It is an arithmetic number, because the mean of its divisors is an integer number (1449225).

Almost surely, 2^20425880 is an apocalyptic number.

20425880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is a pronic number, being equal to 4519×4520.

It is an amenable number.

20425880 is an abundant number, since it is smaller than the sum of its proper divisors (25949320).

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

20425880 is a wasteful number, since it uses less digits than its factorization.

20425880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4643 (or 4639 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 20425880 is about 4519.4999723421. The cubic root of 20425880 is about 273.3549391342.

The spelling of 20425880 in words is "twenty million, four hundred twenty-five thousand, eight hundred eighty".