20952237 has 4 divisors (see below), whose sum is σ = 27936320. Its totient is φ = 13968156.

The previous prime is 20952229. The next prime is 20952247. The reversal of 20952237 is 73225902.

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 not a de Polignac number, because 20952237 - 2³ = 20952229 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 (20952227) 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, 3492037 + ... + 3492042.

It is an arithmetic number, because the mean of its divisors is an integer number (6984080).

Almost surely, 2^20952237 is an apocalyptic number.

It is an amenable number.

20952237 is a deficient number, since it is larger than the sum of its proper divisors (6984083).

20952237 is an equidigital number, since it uses as much as digits as its factorization.

20952237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6984082.

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

The square root of 20952237 is about 4577.3613578130. The cubic root of 20952237 is about 275.6830929941.

The spelling of 20952237 in words is "twenty million, nine hundred fifty-two thousand, two hundred thirty-seven".