20022297157 has 6 divisors (see below), whose sum is σ = 20930681702. Its totient is φ = 19151761992.

The previous prime is 20022297133. The next prime is 20022297161. The reversal of 20022297157 is 75179222002.

It can be written as a sum of positive squares in only one way, i.e., 19407554721 + 614742436 = 139311^2 + 24794^2 .

It is not a de Polignac number, because 20022297157 - 2²³ = 20013908549 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 (20022294157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18924138 + ... + 18925195.

Almost surely, 2^20022297157 is an apocalyptic number.

It is an amenable number.

20022297157 is a deficient number, since it is larger than the sum of its proper divisors (908384545).

20022297157 is an equidigital number, since it uses as much as digits as its factorization.

20022297157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37849379 (or 37849356 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 20022297157 in words is "twenty billion, twenty-two million, two hundred ninety-seven thousand, one hundred fifty-seven".