17910993900 has 36 divisors (see below), whose sum is σ = 51822476552. Its totient is φ = 4776264960.

The previous prime is 17910993899. The next prime is 17910993959. The reversal of 17910993900 is 939901971.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 17910993900.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29851357 + ... + 29851956.

Almost surely, 2^17910993900 is an apocalyptic number.

17910993900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17910993900 is an abundant number, since it is smaller than the sum of its proper divisors (33911482652).

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

17910993900 is a wasteful number, since it uses less digits than its factorization.

17910993900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59703330 (or 59703323 counting only the distinct ones).

The product of its (nonzero) digits is 137781, while the sum is 48.

The spelling of 17910993900 in words is "seventeen billion, nine hundred ten million, nine hundred ninety-three thousand, nine hundred".