20021200199975 has 48 divisors (see below), whose sum is σ = 26827652107872. Its totient is φ = 14734291599360.

The previous prime is 20021200199921. The next prime is 20021200200007. The reversal of 20021200199975 is 57999100212002.

It is a happy number.

It is not a de Polignac number, because 20021200199975 - 2¹⁴ = 20021200183591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 111112304 + ... + 111292346.

It is an arithmetic number, because the mean of its divisors is an integer number (558909418914).

Almost surely, 2^{20021200199975} is an apocalyptic number.

20021200199975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20021200199975 is a deficient number, since it is larger than the sum of its proper divisors (6806451907897).

20021200199975 is a wasteful number, since it uses less digits than its factorization.

20021200199975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181236 (or 181231 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 47.

The spelling of 20021200199975 in words is "twenty trillion, twenty-one billion, two hundred million, one hundred ninety-nine thousand, nine hundred seventy-five".