18773379900 has 648 divisors, whose sum is σ = 68579277312. Its totient is φ = 4286304000.

The previous prime is 18773379881. The next prime is 18773379929. The reversal of 18773379900 is 997337781.

It is a happy number.

18773379900 is a `hidden beast` number, since 187 + 7 + 3 + 379 + 90 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 226185259 + ... + 226185341.

Almost surely, 2^18773379900 is an apocalyptic number.

18773379900 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 18773379900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34289638656).

18773379900 is an abundant number, since it is smaller than the sum of its proper divisors (49805897412).

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

18773379900 is a wasteful number, since it uses less digits than its factorization.

18773379900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 2000376, while the sum is 54.

The spelling of 18773379900 in words is "eighteen billion, seven hundred seventy-three million, three hundred seventy-nine thousand, nine hundred".