18506746480 has 20 divisors (see below), whose sum is σ = 43028185752. Its totient is φ = 7402698560.

The previous prime is 18506746477. The next prime is 18506746481. The reversal of 18506746480 is 8464760581.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18506746481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115667086 + ... + 115667245.

Almost surely, 2^18506746480 is an apocalyptic number.

18506746480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18506746480 is an abundant number, since it is smaller than the sum of its proper divisors (24521439272).

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

18506746480 is a wasteful number, since it uses less digits than its factorization.

18506746480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231334344 (or 231334338 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 18506746480 in words is "eighteen billion, five hundred six million, seven hundred forty-six thousand, four hundred eighty".