920831145621 has 8 divisors (see below), whose sum is σ = 1228031040000. Its totient is φ = 613759340832.

The previous prime is 920831145617. The next prime is 920831145631. The reversal of 920831145621 is 126541138029.

920831145621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 920831145621 - 2² = 920831145617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920831145631) 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, 32005621 + ... + 32034378.

It is an arithmetic number, because the mean of its divisors is an integer number (153503880000).

Almost surely, 2^920831145621 is an apocalyptic number.

It is an amenable number.

920831145621 is a deficient number, since it is larger than the sum of its proper divisors (307199894379).

920831145621 is a wasteful number, since it uses less digits than its factorization.

920831145621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64044795.

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 920831145621 in words is "nine hundred twenty billion, eight hundred thirty-one million, one hundred forty-five thousand, six hundred twenty-one".