20572679 has 4 divisors (see below), whose sum is σ = 20582976. Its totient is φ = 20562384.

The previous prime is 20572663. The next prime is 20572691. The reversal of 20572679 is 97627502.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20572679 - 2⁴ = 20572663 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 (20572609) 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, 1079 + ... + 6504.

It is an arithmetic number, because the mean of its divisors is an integer number (5145744).

Almost surely, 2^20572679 is an apocalyptic number.

20572679 is a deficient number, since it is larger than the sum of its proper divisors (10297).

20572679 is an equidigital number, since it uses as much as digits as its factorization.

20572679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10296.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 20572679 is about 4535.7115208091. The cubic root of 20572679 is about 274.0082358510.

The spelling of 20572679 in words is "twenty million, five hundred seventy-two thousand, six hundred seventy-nine".