20713037 has 4 divisors (see below), whose sum is σ = 20754720. Its totient is φ = 20671356.

The previous prime is 20713019. The next prime is 20713039. The reversal of 20713037 is 73031702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20713037 - 2⁶ = 20712973 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 (20713039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20087 + ... + 21092.

It is an arithmetic number, because the mean of its divisors is an integer number (5188680).

Almost surely, 2^20713037 is an apocalyptic number.

It is an amenable number.

20713037 is a deficient number, since it is larger than the sum of its proper divisors (41683).

20713037 is an equidigital number, since it uses as much as digits as its factorization.

20713037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41682.

The product of its (nonzero) digits is 882, while the sum is 23.

The square root of 20713037 is about 4551.1577647891. The cubic root of 20713037 is about 274.6299684359.

Adding to 20713037 its reverse (73031702), we get a palindrome (93744739).

The spelling of 20713037 in words is "twenty million, seven hundred thirteen thousand, thirty-seven".