30647021421 has 4 divisors (see below), whose sum is σ = 40862695232. Its totient is φ = 20431347612.

The previous prime is 30647021387. The next prime is 30647021443. The reversal of 30647021421 is 12412074603.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 30647021421 - 2⁹ = 30647020909 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 (30647021521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5107836901 + ... + 5107836906.

It is an arithmetic number, because the mean of its divisors is an integer number (10215673808).

Almost surely, 2^30647021421 is an apocalyptic number.

It is an amenable number.

30647021421 is a deficient number, since it is larger than the sum of its proper divisors (10215673811).

30647021421 is a wasteful number, since it uses less digits than its factorization.

30647021421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10215673810.

The product of its (nonzero) digits is 8064, while the sum is 30.

The spelling of 30647021421 in words is "thirty billion, six hundred forty-seven million, twenty-one thousand, four hundred twenty-one".