30145349921 has 4 divisors (see below), whose sum is σ = 30508546992. Its totient is φ = 29782152852.

The previous prime is 30145349873. The next prime is 30145349953. The reversal of 30145349921 is 12994354103.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30145349921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30145349321) 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, 181598411 + ... + 181598576.

It is an arithmetic number, because the mean of its divisors is an integer number (7627136748).

Almost surely, 2^30145349921 is an apocalyptic number.

It is an amenable number.

30145349921 is a deficient number, since it is larger than the sum of its proper divisors (363197071).

30145349921 is an equidigital number, since it uses as much as digits as its factorization.

30145349921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363197070.

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 30145349921 in words is "thirty billion, one hundred forty-five million, three hundred forty-nine thousand, nine hundred twenty-one".