20572239 has 8 divisors (see below), whose sum is σ = 27459712. Its totient is φ = 13699800.

The previous prime is 20572219. The next prime is 20572241. The reversal of 20572239 is 93227502.

It is a happy number.

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

It is not a de Polignac number, because 20572239 - 2¹⁷ = 20441167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20572219) 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, 37 + ... + 6414.

It is an arithmetic number, because the mean of its divisors is an integer number (3432464).

Almost surely, 2^20572239 is an apocalyptic number.

20572239 is a deficient number, since it is larger than the sum of its proper divisors (6887473).

20572239 is a wasteful number, since it uses less digits than its factorization.

20572239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7517.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 20572239 is about 4535.6630165831. The cubic root of 20572239 is about 274.0062823786.

It can be divided in two parts, 205722 and 39, that added together give a triangular number (205761 = T₆₄₁).

The spelling of 20572239 in words is "twenty million, five hundred seventy-two thousand, two hundred thirty-nine".