30139209720 has 96 divisors (see below), whose sum is σ = 98362555200. Its totient is φ = 8003471616.

The previous prime is 30139209703. The next prime is 30139209731. The reversal of 30139209720 is 2790293103.

It is a super-2 number, since 2×30139209720² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89107 + ... + 261186.

It is an arithmetic number, because the mean of its divisors is an integer number (1024609950).

Almost surely, 2^30139209720 is an apocalyptic number.

30139209720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30139209720 is an abundant number, since it is smaller than the sum of its proper divisors (68223345480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30139209720 is a wasteful number, since it uses less digits than its factorization.

30139209720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350549 (or 350542 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The spelling of 30139209720 in words is "thirty billion, one hundred thirty-nine million, two hundred nine thousand, seven hundred twenty".