202991402920 has 64 divisors (see below), whose sum is σ = 489030987600. Its totient is φ = 75561615360.

The previous prime is 202991402897. The next prime is 202991402953. The reversal of 202991402920 is 29204199202.

It can be written as a sum of positive squares in 8 ways, for example, as 75923393764 + 127068009156 = 275542^2 + 356466^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1616541 + ... + 1737580.

Almost surely, 2^202991402920 is an apocalyptic number.

202991402920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202991402920 is an abundant number, since it is smaller than the sum of its proper divisors (286039584680).

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

202991402920 is a wasteful number, since it uses less digits than its factorization.

202991402920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354238 (or 3354234 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 202991402920 in words is "two hundred two billion, nine hundred ninety-one million, four hundred two thousand, nine hundred twenty".