20124442041021 has 20 divisors (see below), whose sum is σ = 30795668313564. Its totient is φ = 13089067992000.

The previous prime is 20124442041017. The next prime is 20124442041023. The reversal of 20124442041021 is 12014024442102.

20124442041021 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 444 + 204 + 10 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6389924508900 + 13734517532121 = 2527830^2 + 3706011^2 .

It is not a de Polignac number, because 20124442041021 - 2² = 20124442041017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124442041023) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3029873530 + ... + 3029880171.

Almost surely, 2^{20124442041021} is an apocalyptic number.

It is an amenable number.

20124442041021 is a deficient number, since it is larger than the sum of its proper divisors (10671226272543).

20124442041021 is an equidigital number, since it uses as much as digits as its factorization.

20124442041021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6059753754 (or 6059753745 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

Adding to 20124442041021 its reverse (12014024442102), we get a palindrome (32138466483123).

The spelling of 20124442041021 in words is "twenty trillion, one hundred twenty-four billion, four hundred forty-two million, forty-one thousand, twenty-one".