30746120021 has 16 divisors (see below), whose sum is σ = 32849895936. Its totient is φ = 28707131376.

The previous prime is 30746120011. The next prime is 30746120077. The reversal of 30746120021 is 12002164703.

It is a cyclic number.

It is not a de Polignac number, because 30746120021 - 2¹⁴ = 30746103637 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 (30746120011) 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, 1695026 + ... + 1713068.

It is an arithmetic number, because the mean of its divisors is an integer number (2053118496).

Almost surely, 2^30746120021 is an apocalyptic number.

It is an amenable number.

30746120021 is a deficient number, since it is larger than the sum of its proper divisors (2103775915).

30746120021 is a wasteful number, since it uses less digits than its factorization.

30746120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19832.

The product of its (nonzero) digits is 2016, while the sum is 26.

Adding to 30746120021 its reverse (12002164703), we get a palindrome (42748284724).

The spelling of 30746120021 in words is "thirty billion, seven hundred forty-six million, one hundred twenty thousand, twenty-one".