30920672479 has 4 divisors (see below), whose sum is σ = 32739535584. Its totient is φ = 29101809376.

The previous prime is 30920672477. The next prime is 30920672533. The reversal of 30920672479 is 97427602903.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97427602903 = 83 ⋅1173826541.

It is a cyclic number.

It is not a de Polignac number, because 30920672479 - 2¹ = 30920672477 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 (30920672477) 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, 909431527 + ... + 909431560.

It is an arithmetic number, because the mean of its divisors is an integer number (8184883896).

Almost surely, 2^30920672479 is an apocalyptic number.

30920672479 is a deficient number, since it is larger than the sum of its proper divisors (1818863105).

30920672479 is a wasteful number, since it uses less digits than its factorization.

30920672479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818863104.

The product of its (nonzero) digits is 1143072, while the sum is 49.

The spelling of 30920672479 in words is "thirty billion, nine hundred twenty million, six hundred seventy-two thousand, four hundred seventy-nine".