20589740 has 12 divisors (see below), whose sum is σ = 43238496. Its totient is φ = 8235888.

The previous prime is 20589721. The next prime is 20589763. The reversal of 20589740 is 4798502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20589740.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514724 + ... + 514763.

It is an arithmetic number, because the mean of its divisors is an integer number (3603208).

Almost surely, 2^20589740 is an apocalyptic number.

20589740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20589740 is an abundant number, since it is smaller than the sum of its proper divisors (22648756).

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

20589740 is a wasteful number, since it uses less digits than its factorization.

20589740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029496 (or 1029494 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20589740 is about 4537.5918723482. The cubic root of 20589740 is about 274.0839602752.

The spelling of 20589740 in words is "twenty million, five hundred eighty-nine thousand, seven hundred forty".