18872777097 has 12 divisors (see below), whose sum is σ = 27369289584. Its totient is φ = 12531723000.

The previous prime is 18872777087. The next prime is 18872777107. The reversal of 18872777097 is 79077727881.

It is an interprime number because it is at equal distance from previous prime (18872777087) and next prime (18872777107).

It is not a de Polignac number, because 18872777097 - 2²⁰ = 18871728521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18872777057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4174983 + ... + 4179500.

It is an arithmetic number, because the mean of its divisors is an integer number (2280774132).

Almost surely, 2^18872777097 is an apocalyptic number.

It is an amenable number.

18872777097 is a deficient number, since it is larger than the sum of its proper divisors (8496512487).

18872777097 is a wasteful number, since it uses less digits than its factorization.

18872777097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8354740 (or 8354737 counting only the distinct ones).

The product of its (nonzero) digits is 19361664, while the sum is 63.

The spelling of 18872777097 in words is "eighteen billion, eight hundred seventy-two million, seven hundred seventy-seven thousand, ninety-seven".