20731236730932 has 144 divisors (see below), whose sum is σ = 59874145615872. Its totient is φ = 5466559063680.

The previous prime is 20731236730903. The next prime is 20731236730937. The reversal of 20731236730932 is 23903763213702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20731236730937) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77532853 + ... + 77799779.

It is an arithmetic number, because the mean of its divisors is an integer number (415792677888).

Almost surely, 2^{20731236730932} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20731236730932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29937072807936).

20731236730932 is an abundant number, since it is smaller than the sum of its proper divisors (39142908884940).

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

20731236730932 is a wasteful number, since it uses less digits than its factorization.

20731236730932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272438 (or 272423 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 48.

The spelling of 20731236730932 in words is "twenty trillion, seven hundred thirty-one billion, two hundred thirty-six million, seven hundred thirty thousand, nine hundred thirty-two".