18770222157 has 16 divisors (see below), whose sum is σ = 25423896960. Its totient is φ = 12316536000.

The previous prime is 18770222153. The next prime is 18770222161. The reversal of 18770222157 is 75122207781.

It is an interprime number because it is at equal distance from previous prime (18770222153) and next prime (18770222161).

It is not a de Polignac number, because 18770222157 - 2² = 18770222153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18770222153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140694 + ... + 239447.

It is an arithmetic number, because the mean of its divisors is an integer number (1588993560).

Almost surely, 2^18770222157 is an apocalyptic number.

It is an amenable number.

18770222157 is a deficient number, since it is larger than the sum of its proper divisors (6653674803).

18770222157 is a wasteful number, since it uses less digits than its factorization.

18770222157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380404.

The product of its (nonzero) digits is 109760, while the sum is 42.

The spelling of 18770222157 in words is "eighteen billion, seven hundred seventy million, two hundred twenty-two thousand, one hundred fifty-seven".