18840872115 has 96 divisors (see below), whose sum is σ = 37624257216. Its totient is φ = 8639447040.

The previous prime is 18840872069. The next prime is 18840872117. The reversal of 18840872115 is 51127804881.

It is not a de Polignac number, because 18840872115 - 2⁹ = 18840871603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (18840872117) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 954900 + ... + 974430.

It is an arithmetic number, because the mean of its divisors is an integer number (391919346).

Almost surely, 2^18840872115 is an apocalyptic number.

18840872115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18840872115 is a deficient number, since it is larger than the sum of its proper divisors (18783385101).

18840872115 is a wasteful number, since it uses less digits than its factorization.

18840872115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19669 (or 19666 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 45.

The spelling of 18840872115 in words is "eighteen billion, eight hundred forty million, eight hundred seventy-two thousand, one hundred fifteen".