20852737 has 4 divisors (see below), whose sum is σ = 20885040. Its totient is φ = 20820436.

The previous prime is 20852707. The next prime is 20852773. The reversal of 20852737 is 73725802.

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 20852737 - 2⁷ = 20852609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20852707) 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, 15163 + ... + 16480.

It is an arithmetic number, because the mean of its divisors is an integer number (5221260).

Almost surely, 2^20852737 is an apocalyptic number.

It is an amenable number.

20852737 is a deficient number, since it is larger than the sum of its proper divisors (32303).

20852737 is an equidigital number, since it uses as much as digits as its factorization.

20852737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32302.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 20852737 is about 4566.4797163680. The cubic root of 20852737 is about 275.2460035613.

The spelling of 20852737 in words is "twenty million, eight hundred fifty-two thousand, seven hundred thirty-seven".