30431973896988 has 12 divisors (see below), whose sum is σ = 71007939093000. Its totient is φ = 10143991298992.

The previous prime is 30431973896981. The next prime is 30431973897011. The reversal of 30431973896988 is 88969837913403.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×30431973896988² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30431973896981) 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, 1267998912363 + ... + 1267998912386.

It is an arithmetic number, because the mean of its divisors is an integer number (5917328257750).

Almost surely, 2^{30431973896988} is an apocalyptic number.

It is an amenable number.

30431973896988 is an abundant number, since it is smaller than the sum of its proper divisors (40575965196012).

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

30431973896988 is a wasteful number, since it uses less digits than its factorization.

30431973896988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535997824756 (or 2535997824754 counting only the distinct ones).

The product of its (nonzero) digits is 1693052928, while the sum is 78.

The spelling of 30431973896988 in words is "thirty trillion, four hundred thirty-one billion, nine hundred seventy-three million, eight hundred ninety-six thousand, nine hundred eighty-eight".