23020537 has 4 divisors (see below), whose sum is σ = 23050576. Its totient is φ = 22990500.

The previous prime is 23020511. The next prime is 23020573. The reversal of 23020537 is 73502032.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-23020537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23020337) 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, 13839 + ... + 15412.

It is an arithmetic number, because the mean of its divisors is an integer number (5762644).

Almost surely, 2^23020537 is an apocalyptic number.

It is an amenable number.

23020537 is a deficient number, since it is larger than the sum of its proper divisors (30039).

23020537 is an equidigital number, since it uses as much as digits as its factorization.

23020537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30038.

The product of its (nonzero) digits is 1260, while the sum is 22.

The square root of 23020537 is about 4797.9721758259. The cubic root of 23020537 is about 284.4713170017.

Adding to 23020537 its reverse (73502032), we get a palindrome (96522569).

The spelling of 23020537 in words is "twenty-three million, twenty thousand, five hundred thirty-seven".