30600138921 has 16 divisors (see below), whose sum is σ = 44755209408. Its totient is φ = 18443073600.

The previous prime is 30600138917. The next prime is 30600138923. The reversal of 30600138921 is 12983100603.

It is not a de Polignac number, because 30600138921 - 2² = 30600138917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30600138923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2555566 + ... + 2567511.

It is an arithmetic number, because the mean of its divisors is an integer number (2797200588).

Almost surely, 2^30600138921 is an apocalyptic number.

It is an amenable number.

30600138921 is a deficient number, since it is larger than the sum of its proper divisors (14155070487).

30600138921 is a wasteful number, since it uses less digits than its factorization.

30600138921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5123272.

The product of its (nonzero) digits is 7776, while the sum is 33.

The spelling of 30600138921 in words is "thirty billion, six hundred million, one hundred thirty-eight thousand, nine hundred twenty-one".