20031531532 has 12 divisors (see below), whose sum is σ = 35449059240. Its totient is φ = 9903228896.

The previous prime is 20031531529. The next prime is 20031531587. The reversal of 20031531532 is 23513513002.

It is a junction number, because it is equal to n+sod(n) for n = 20031531497 and 20031531506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28133818 + ... + 28134529.

It is an arithmetic number, because the mean of its divisors is an integer number (2954088270).

Almost surely, 2^20031531532 is an apocalyptic number.

It is an amenable number.

20031531532 is a deficient number, since it is larger than the sum of its proper divisors (15417527708).

20031531532 is a wasteful number, since it uses less digits than its factorization.

20031531532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56268440 (or 56268438 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

The spelling of 20031531532 in words is "twenty billion, thirty-one million, five hundred thirty-one thousand, five hundred thirty-two".