920973626621 has 16 divisors (see below), whose sum is σ = 1012616721648. Its totient is φ = 834072883200.

The previous prime is 920973626611. The next prime is 920973626681. The reversal of 920973626621 is 126626379029.

It can be written as a sum of positive squares in 8 ways, for example, as 1511265625 + 919462360996 = 38875^2 + 958886^2 .

It is a cyclic number.

It is not a de Polignac number, because 920973626621 - 2⁶ = 920973626557 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 (920973626611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8999390 + ... + 9101151.

It is an arithmetic number, because the mean of its divisors is an integer number (63288545103).

Almost surely, 2^920973626621 is an apocalyptic number.

It is an amenable number.

920973626621 is a deficient number, since it is larger than the sum of its proper divisors (91643095027).

920973626621 is a wasteful number, since it uses less digits than its factorization.

920973626621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18100672.

The product of its (nonzero) digits is 2939328, while the sum is 53.

The spelling of 920973626621 in words is "nine hundred twenty billion, nine hundred seventy-three million, six hundred twenty-six thousand, six hundred twenty-one".