20572590 has 16 divisors (see below), whose sum is σ = 49374288. Its totient is φ = 5486016.

The previous prime is 20572553. The next prime is 20572597. The reversal of 20572590 is 9527502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 685753 = 20572590 / (2 + 0 + 5 + 7 + 2 + 5 + 9 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20572597) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342847 + ... + 342906.

It is an arithmetic number, because the mean of its divisors is an integer number (3085893).

Almost surely, 2^20572590 is an apocalyptic number.

20572590 is an abundant number, since it is smaller than the sum of its proper divisors (28801698).

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

20572590 is a wasteful number, since it uses less digits than its factorization.

20572590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685763.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 20572590 is about 4535.7017097688. The cubic root of 20572590 is about 274.0078407190.

The spelling of 20572590 in words is "twenty million, five hundred seventy-two thousand, five hundred ninety".