20589402 has 8 divisors (see below), whose sum is σ = 41178816. Its totient is φ = 6863132.

The previous prime is 20589383. The next prime is 20589409. The reversal of 20589402 is 20498502.

It is a sphenic number, since it is the product of 3 distinct primes.

20589402 is an admirable number.

It is a super-4 number, since 4×20589402⁴ (a number of 30 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20589402.

It is not an unprimeable number, because it can be changed into a prime (20589409) 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 3 ways as a sum of consecutive naturals, for example, 1715778 + ... + 1715789.

It is an arithmetic number, because the mean of its divisors is an integer number (5147352).

Almost surely, 2^20589402 is an apocalyptic number.

20589402 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.

20589402 is a wasteful number, since it uses less digits than its factorization.

20589402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3431572.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 20589402 is about 4537.5546277703. The cubic root of 20589402 is about 274.0824604848.

The spelling of 20589402 in words is "twenty million, five hundred eighty-nine thousand, four hundred two".