20572013 has 12 divisors (see below), whose sum is σ = 26106912. Its totient is φ = 16029720.

The previous prime is 20572009. The next prime is 20572033. The reversal of 20572013 is 31027502.

It is not a de Polignac number, because 20572013 - 2² = 20572009 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 (20572033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18545 + ... + 19622.

It is an arithmetic number, because the mean of its divisors is an integer number (2175576).

Almost surely, 2^20572013 is an apocalyptic number.

It is an amenable number.

20572013 is a deficient number, since it is larger than the sum of its proper divisors (5534899).

20572013 is a wasteful number, since it uses less digits than its factorization.

20572013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38192 (or 38185 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20572013 is about 4535.6381028473. The cubic root of 20572013 is about 274.0052789933.

Adding to 20572013 its reverse (31027502), we get a palindrome (51599515).

The spelling of 20572013 in words is "twenty million, five hundred seventy-two thousand, thirteen".