20199999600 has 180 divisors, whose sum is σ = 76472451432. Its totient is φ = 4896960000.

The previous prime is 20199999581. The next prime is 20199999623. The reversal of 20199999600 is 699999102.

It is a happy number.

20199999600 is a `hidden beast` number, since 20 + 1 + 9 + 9 + 9 + 9 + 9 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 215451 + ... + 294650.

Almost surely, 2^20199999600 is an apocalyptic number.

20199999600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20199999600 is an abundant number, since it is smaller than the sum of its proper divisors (56272451832).

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

20199999600 is a wasteful number, since it uses less digits than its factorization.

20199999600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510136 (or 510122 counting only the distinct ones).

The product of its (nonzero) digits is 708588, while the sum is 54.

The spelling of 20199999600 in words is "twenty billion, one hundred ninety-nine million, nine hundred ninety-nine thousand, six hundred".