18957120319 has 2 divisors, whose sum is σ = 18957120320. Its totient is φ = 18957120318.

The previous prime is 18957120307. The next prime is 18957120409. The reversal of 18957120319 is 91302175981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18957120319 - 2¹³ = 18957112127 is a prime.

It is a super-2 number, since 2×18957120319² (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 (18957120619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9478560159 + 9478560160.

It is an arithmetic number, because the mean of its divisors is an integer number (9478560160).

Almost surely, 2^18957120319 is an apocalyptic number.

18957120319 is a deficient number, since it is larger than the sum of its proper divisors (1).

18957120319 is an equidigital number, since it uses as much as digits as its factorization.

18957120319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 46.

The spelling of 18957120319 in words is "eighteen billion, nine hundred fifty-seven million, one hundred twenty thousand, three hundred nineteen".