20055021372021 has 16 divisors (see below), whose sum is σ = 27617394771968. Its totient is φ = 12931793132400.

The previous prime is 20055021371923. The next prime is 20055021372059. The reversal of 20055021372021 is 12027312055002.

It is not a de Polignac number, because 20055021372021 - 2¹⁷ = 20055021240949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20055021372021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20055021372121) by changing a digit.

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, 57578215 + ... + 57925476.

It is an arithmetic number, because the mean of its divisors is an integer number (1726087173248).

Almost surely, 2^{20055021372021} is an apocalyptic number.

It is an amenable number.

20055021372021 is a deficient number, since it is larger than the sum of its proper divisors (7562373399947).

20055021372021 is a wasteful number, since it uses less digits than its factorization.

20055021372021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115505592.

The product of its (nonzero) digits is 8400, while the sum is 30.

The spelling of 20055021372021 in words is "twenty trillion, fifty-five billion, twenty-one million, three hundred seventy-two thousand, twenty-one".