30724299021 has 8 divisors (see below), whose sum is σ = 44116942240. Its totient is φ = 18907260912.

The previous prime is 30724299007. The next prime is 30724299037. The reversal of 30724299021 is 12099242703.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30724299021 - 2⁷ = 30724298893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 787802539 = 30724299021 / (3 + 0 + 7 + 2 + 4 + 2 + 9 + 9 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30724299041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393901231 + ... + 393901308.

It is an arithmetic number, because the mean of its divisors is an integer number (5514617780).

Almost surely, 2^30724299021 is an apocalyptic number.

It is an amenable number.

30724299021 is a deficient number, since it is larger than the sum of its proper divisors (13392643219).

30724299021 is a wasteful number, since it uses less digits than its factorization.

30724299021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787802555.

The product of its (nonzero) digits is 54432, while the sum is 39.

The spelling of 30724299021 in words is "thirty billion, seven hundred twenty-four million, two hundred ninety-nine thousand, twenty-one".