18996699960 has 576 divisors, whose sum is σ = 75409850880. Its totient is φ = 4213036800.

The previous prime is 18996699923. The next prime is 18996699983. The reversal of 18996699960 is 6999669981.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 125805885 + ... + 125806035.

It is an arithmetic number, because the mean of its divisors is an integer number (130919880).

Almost surely, 2^18996699960 is an apocalyptic number.

18996699960 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 18996699960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37704925440).

18996699960 is an abundant number, since it is smaller than the sum of its proper divisors (56413150920).

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

18996699960 is a wasteful number, since it uses less digits than its factorization.

18996699960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 102036672, while the sum is 72.

The spelling of 18996699960 in words is "eighteen billion, nine hundred ninety-six million, six hundred ninety-nine thousand, nine hundred sixty".