18952191457 has 4 divisors (see below), whose sum is σ = 19047428800. Its totient is φ = 18856954116.

The previous prime is 18952191451. The next prime is 18952191469. The reversal of 18952191457 is 75419125981.

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 18952191457 - 2¹⁵ = 18952158689 is a prime.

It is a super-2 number, since 2×18952191457² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18952191451) 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 3 ways as a sum of consecutive naturals, for example, 47618373 + ... + 47618770.

It is an arithmetic number, because the mean of its divisors is an integer number (4761857200).

Almost surely, 2^18952191457 is an apocalyptic number.

It is an amenable number.

18952191457 is a deficient number, since it is larger than the sum of its proper divisors (95237343).

18952191457 is an equidigital number, since it uses as much as digits as its factorization.

18952191457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95237342.

The product of its digits is 907200, while the sum is 52.

The spelling of 18952191457 in words is "eighteen billion, nine hundred fifty-two million, one hundred ninety-one thousand, four hundred fifty-seven".