202001999972 has 6 divisors (see below), whose sum is σ = 353503499958. Its totient is φ = 101000999984.

The previous prime is 202001999963. The next prime is 202001999989. The reversal of 202001999972 is 279999100202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 195128926756 + 6873073216 = 441734^2 + 82904^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 202001999972.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25250249993 + ... + 25250250000.

It is an arithmetic number, because the mean of its divisors is an integer number (58917249993).

Almost surely, 2^202001999972 is an apocalyptic number.

It is an amenable number.

202001999972 is a deficient number, since it is larger than the sum of its proper divisors (151501499986).

202001999972 is a wasteful number, since it uses less digits than its factorization.

202001999972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50500499997 (or 50500499995 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 50.

The spelling of 202001999972 in words is "two hundred two billion, one million, nine hundred ninety-nine thousand, nine hundred seventy-two".