30072498821 has 4 divisors (see below), whose sum is σ = 30805974444. Its totient is φ = 29339023200.

The previous prime is 30072498803. The next prime is 30072498871. The reversal of 30072498821 is 12889427003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12889427003 = 1049 ⋅12287347.

It can be written as a sum of positive squares in 2 ways, for example, as 6552902500 + 23519596321 = 80950^2 + 153361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30072498821 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 (30072498871) 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, 366737750 + ... + 366737831.

It is an arithmetic number, because the mean of its divisors is an integer number (7701493611).

Almost surely, 2^30072498821 is an apocalyptic number.

It is an amenable number.

30072498821 is a deficient number, since it is larger than the sum of its proper divisors (733475623).

30072498821 is an equidigital number, since it uses as much as digits as its factorization.

30072498821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733475622.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 30072498821 in words is "thirty billion, seventy-two million, four hundred ninety-eight thousand, eight hundred twenty-one".