18491290932 has 96 divisors (see below), whose sum is σ = 46156787712. Its totient is φ = 5741438976.

The previous prime is 18491290919. The next prime is 18491290957. The reversal of 18491290932 is 23909219481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16917378 + ... + 16918470.

It is an arithmetic number, because the mean of its divisors is an integer number (480799872).

Almost surely, 2^18491290932 is an apocalyptic number.

18491290932 is a gapful number since it is divisible by the number (12) 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 18491290932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23078393856).

18491290932 is an abundant number, since it is smaller than the sum of its proper divisors (27665496780).

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

18491290932 is a wasteful number, since it uses less digits than its factorization.

18491290932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897 (or 1895 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 48.

The spelling of 18491290932 in words is "eighteen billion, four hundred ninety-one million, two hundred ninety thousand, nine hundred thirty-two".