30172693621 has 8 divisors (see below), whose sum is σ = 34486994880. Its totient is φ = 25859371488.

The previous prime is 30172693601. The next prime is 30172693651. The reversal of 30172693621 is 12639627103.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 30172693621 - 2¹⁹ = 30172169333 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 (30172693601) 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, 177511 + ... + 303076.

It is an arithmetic number, because the mean of its divisors is an integer number (4310874360).

Almost surely, 2^30172693621 is an apocalyptic number.

It is an amenable number.

30172693621 is a deficient number, since it is larger than the sum of its proper divisors (4314301259).

30172693621 is an equidigital number, since it uses as much as digits as its factorization.

30172693621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489563.

The product of its (nonzero) digits is 81648, while the sum is 40.

The spelling of 30172693621 in words is "thirty billion, one hundred seventy-two million, six hundred ninety-three thousand, six hundred twenty-one".