18196413971 has 2 divisors, whose sum is σ = 18196413972. Its totient is φ = 18196413970.

The previous prime is 18196413929. The next prime is 18196413973. The reversal of 18196413971 is 17931469181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18196413971 - 2²² = 18192219667 is a prime.

It is a super-2 number, since 2×18196413971² (a number of 21 digits) contains 22 as substring.

Together with 18196413973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18196413973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9098206985 + 9098206986.

It is an arithmetic number, because the mean of its divisors is an integer number (9098206986).

Almost surely, 2^18196413971 is an apocalyptic number.

18196413971 is a deficient number, since it is larger than the sum of its proper divisors (1).

18196413971 is an equidigital number, since it uses as much as digits as its factorization.

18196413971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 50.

The spelling of 18196413971 in words is "eighteen billion, one hundred ninety-six million, four hundred thirteen thousand, nine hundred seventy-one".