18974645983 has 2 divisors, whose sum is σ = 18974645984. Its totient is φ = 18974645982.

The previous prime is 18974645951. The next prime is 18974646013. The reversal of 18974645983 is 38954647981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18974645983 - 2⁵ = 18974645951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18974645923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9487322991 + 9487322992.

It is an arithmetic number, because the mean of its divisors is an integer number (9487322992).

Almost surely, 2^18974645983 is an apocalyptic number.

18974645983 is a deficient number, since it is larger than the sum of its proper divisors (1).

18974645983 is an equidigital number, since it uses as much as digits as its factorization.

18974645983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52254720, while the sum is 64.

The spelling of 18974645983 in words is "eighteen billion, nine hundred seventy-four million, six hundred forty-five thousand, nine hundred eighty-three".