20909299200 has 120 divisors (see below), whose sum is σ = 69072689928. Its totient is φ = 5575802880.

The previous prime is 20909299181. The next prime is 20909299211. The reversal of 20909299200 is 299290902.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

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, 233857 + ... + 310656.

Almost surely, 2^20909299200 is an apocalyptic number.

20909299200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20909299200 is an abundant number, since it is smaller than the sum of its proper divisors (48163390728).

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

20909299200 is an equidigital number, since it uses as much as digits as its factorization.

20909299200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544544 (or 544523 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 42.

The spelling of 20909299200 in words is "twenty billion, nine hundred nine million, two hundred ninety-nine thousand, two hundred".