30031029972 has 36 divisors (see below), whose sum is σ = 77198415840. Its totient is φ = 9840675792.

The previous prime is 30031029923. The next prime is 30031029979. The reversal of 30031029972 is 27992013003.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×30031029972² (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 not an unprimeable number, because it can be changed into a prime (30031029979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7067328 + ... + 7071575.

It is an arithmetic number, because the mean of its divisors is an integer number (2144400440).

Almost surely, 2^30031029972 is an apocalyptic number.

It is an amenable number.

30031029972 is an abundant number, since it is smaller than the sum of its proper divisors (47167385868).

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

30031029972 is a wasteful number, since it uses less digits than its factorization.

30031029972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14138972 (or 14138967 counting only the distinct ones).

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

The spelling of 30031029972 in words is "thirty billion, thirty-one million, twenty-nine thousand, nine hundred seventy-two".