18790447632 has 640 divisors, whose sum is σ = 62533140480. Its totient is φ = 4790016000.

The previous prime is 18790447619. The next prime is 18790447657. The reversal of 18790447632 is 23674409781.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 264654157 + ... + 264654227.

It is an arithmetic number, because the mean of its divisors is an integer number (97708032).

Almost surely, 2^18790447632 is an apocalyptic number.

18790447632 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 18790447632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31266570240).

18790447632 is an abundant number, since it is smaller than the sum of its proper divisors (43742692848).

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

18790447632 is a wasteful number, since it uses less digits than its factorization.

18790447632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 18790447632 in words is "eighteen billion, seven hundred ninety million, four hundred forty-seven thousand, six hundred thirty-two".