18657930900 has 180 divisors, whose sum is σ = 62979566272. Its totient is φ = 4264505280.

The previous prime is 18657930887. The next prime is 18657930913. The reversal of 18657930900 is 903975681.

It is an interprime number because it is at equal distance from previous prime (18657930887) and next prime (18657930913).

It is a self number, because there is not a number n which added to its sum of digits gives 18657930900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 707349 + ... + 733251.

Almost surely, 2^18657930900 is an apocalyptic number.

18657930900 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 18657930900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31489783136).

18657930900 is an abundant number, since it is smaller than the sum of its proper divisors (44321635372).

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

18657930900 is a wasteful number, since it uses less digits than its factorization.

18657930900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25948 (or 25920 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 18657930900 in words is "eighteen billion, six hundred fifty-seven million, nine hundred thirty thousand, nine hundred".