18821652480 has 672 divisors, whose sum is σ = 70988456448. Its totient is φ = 4777574400.

The previous prime is 18821652469. The next prime is 18821652533. The reversal of 18821652480 is 8425612881.

18821652480 is a `hidden beast` number, since 1 + 8 + 8 + 2 + 165 + 2 + 480 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 308551650 + ... + 308551710.

It is an arithmetic number, because the mean of its divisors is an integer number (105637584).

Almost surely, 2^18821652480 is an apocalyptic number.

18821652480 is a gapful number since it is divisible by the number (10) 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 18821652480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35494228224).

18821652480 is an abundant number, since it is smaller than the sum of its proper divisors (52166803968).

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

18821652480 is an frugal number, since it uses more digits than its factorization.

18821652480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The spelling of 18821652480 in words is "eighteen billion, eight hundred twenty-one million, six hundred fifty-two thousand, four hundred eighty".