30972423021 has 8 divisors (see below), whose sum is σ = 41453586240. Its totient is φ = 20569770912.

The previous prime is 30972423019. The next prime is 30972423043. The reversal of 30972423021 is 12032427903.

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

It is not a de Polignac number, because 30972423021 - 2¹ = 30972423019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30972423061) 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, 19626856 + ... + 19628433.

It is an arithmetic number, because the mean of its divisors is an integer number (5181698280).

Almost surely, 2^30972423021 is an apocalyptic number.

It is an amenable number.

30972423021 is a deficient number, since it is larger than the sum of its proper divisors (10481163219).

30972423021 is a wasteful number, since it uses less digits than its factorization.

30972423021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39255555.

The product of its (nonzero) digits is 18144, while the sum is 33.

The spelling of 30972423021 in words is "thirty billion, nine hundred seventy-two million, four hundred twenty-three thousand, twenty-one".