20201992 has 8 divisors (see below), whose sum is σ = 37878750. Its totient is φ = 10100992.

The previous prime is 20201983. The next prime is 20202011. The reversal of 20201992 is 29910202.

It can be written as a sum of positive squares in only one way, i.e., 14791716 + 5410276 = 3846^2 + 2326^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1262617 + ... + 1262632.

Almost surely, 2^20201992 is an apocalyptic number.

It is an amenable number.

20201992 is a deficient number, since it is larger than the sum of its proper divisors (17676758).

20201992 is a wasteful number, since it uses less digits than its factorization.

20201992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525255 (or 2525251 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 20201992 is about 4494.6626124772. The cubic root of 20201992 is about 272.3525201463.

The spelling of 20201992 in words is "twenty million, two hundred one thousand, nine hundred ninety-two".