20501531332 has 12 divisors (see below), whose sum is σ = 36035732880. Its totient is φ = 10205607656.

The previous prime is 20501531273. The next prime is 20501531333. The reversal of 20501531332 is 23313510502.

It is a junction number, because it is equal to n+sod(n) for n = 20501531297 and 20501531306.

It is not an unprimeable number, because it can be changed into a prime (20501531333) by changing a digit.

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, 11288482 + ... + 11290297.

It is an arithmetic number, because the mean of its divisors is an integer number (3002977740).

Almost surely, 2^20501531332 is an apocalyptic number.

It is an amenable number.

20501531332 is a deficient number, since it is larger than the sum of its proper divisors (15534201548).

20501531332 is a wasteful number, since it uses less digits than its factorization.

20501531332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22579010 (or 22579008 counting only the distinct ones).

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

The spelling of 20501531332 in words is "twenty billion, five hundred one million, five hundred thirty-one thousand, three hundred thirty-two".