20621918744313 has 8 divisors (see below), whose sum is σ = 27496043371776. Its totient is φ = 13747869973200.

The previous prime is 20621918744257. The next prime is 20621918744347. The reversal of 20621918744313 is 31344781912602.

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 20621918744313 - 2⁸ = 20621918744057 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20621918748313) 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, 18326698 + ... + 19419363.

It is an arithmetic number, because the mean of its divisors is an integer number (3437005421472).

Almost surely, 2^{20621918744313} is an apocalyptic number.

It is an amenable number.

20621918744313 is a deficient number, since it is larger than the sum of its proper divisors (6874124627463).

20621918744313 is a wasteful number, since it uses less digits than its factorization.

20621918744313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37928175.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 20621918744313 in words is "twenty trillion, six hundred twenty-one billion, nine hundred eighteen million, seven hundred forty-four thousand, three hundred thirteen".