18908373216 has 96 divisors (see below), whose sum is σ = 53074955808. Its totient is φ = 5873254400.

The previous prime is 18908373179. The next prime is 18908373257. The reversal of 18908373216 is 61237380981.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107476 + ... + 222188.

It is an arithmetic number, because the mean of its divisors is an integer number (552864123).

Almost surely, 2^18908373216 is an apocalyptic number.

18908373216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18908373216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26537477904).

18908373216 is an abundant number, since it is smaller than the sum of its proper divisors (34166582592).

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

18908373216 is a wasteful number, since it uses less digits than its factorization.

18908373216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114844 (or 114836 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 18908373216 in words is "eighteen billion, nine hundred eight million, three hundred seventy-three thousand, two hundred sixteen".