20589480 has 48 divisors (see below), whose sum is σ = 66916980. Its totient is φ = 5490432.

The previous prime is 20589479. The next prime is 20589497. The reversal of 20589480 is 8498502.

It can be written as a sum of positive squares in 2 ways, for example, as 19873764 + 715716 = 4458^2 + 846^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28237 + ... + 28956.

Almost surely, 2^20589480 is an apocalyptic number.

20589480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20589480 is an abundant number, since it is smaller than the sum of its proper divisors (46327500).

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

20589480 is a wasteful number, since it uses less digits than its factorization.

20589480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57210 (or 57203 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 20589480 is about 4537.5632227000. The cubic root of 20589480 is about 274.0828065917.

The spelling of 20589480 in words is "twenty million, five hundred eighty-nine thousand, four hundred eighty".