18916299870 has 64 divisors (see below), whose sum is σ = 51464609280. Its totient is φ = 4411248768.

The previous prime is 18916299863. The next prime is 18916299877. The reversal of 18916299870 is 7899261981.

It is an interprime number because it is at equal distance from previous prime (18916299863) and next prime (18916299877).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18916299877) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1268994 + ... + 1283813.

It is an arithmetic number, because the mean of its divisors is an integer number (804134520).

Almost surely, 2^18916299870 is an apocalyptic number.

18916299870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18916299870 is an abundant number, since it is smaller than the sum of its proper divisors (32548309410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18916299870 is a wasteful number, since it uses less digits than its factorization.

18916299870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552849.

The product of its (nonzero) digits is 3919104, while the sum is 60.

The spelling of 18916299870 in words is "eighteen billion, nine hundred sixteen million, two hundred ninety-nine thousand, eight hundred seventy".