20426664055021 has 8 divisors (see below), whose sum is σ = 23346146229120. Its totient is φ = 17507528708208.

The previous prime is 20426664054977. The next prime is 20426664055067. The reversal of 20426664055021 is 12055046662402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20426664055021 - 2¹¹ = 20426664052973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426664055081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86580601 + ... + 86816206.

It is an arithmetic number, because the mean of its divisors is an integer number (2918268278640).

Almost surely, 2^{20426664055021} is an apocalyptic number.

It is an amenable number.

20426664055021 is a deficient number, since it is larger than the sum of its proper divisors (2919482174099).

20426664055021 is a wasteful number, since it uses less digits than its factorization.

20426664055021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173413643.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 20426664055021 in words is "twenty trillion, four hundred twenty-six billion, six hundred sixty-four million, fifty-five thousand, twenty-one".