20955001237 has 2 divisors, whose sum is σ = 20955001238. Its totient is φ = 20955001236.

The previous prime is 20955001229. The next prime is 20955001289. The reversal of 20955001237 is 73210055902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16071647076 + 4883354161 = 126774^2 + 69881^2 .

It is a cyclic number.

It is not a de Polignac number, because 20955001237 - 2³ = 20955001229 is a prime.

It is a super-2 number, since 2×20955001237² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20955001297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10477500618 + 10477500619.

It is an arithmetic number, because the mean of its divisors is an integer number (10477500619).

Almost surely, 2^20955001237 is an apocalyptic number.

It is an amenable number.

20955001237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20955001237 is an equidigital number, since it uses as much as digits as its factorization.

20955001237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 34.

The spelling of 20955001237 in words is "twenty billion, nine hundred fifty-five million, one thousand, two hundred thirty-seven".