20781732332 has 12 divisors (see below), whose sum is σ = 36409038960. Its totient is φ = 10379149776.

The previous prime is 20781732287. The next prime is 20781732341. The reversal of 20781732332 is 23323718702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2925107 + ... + 2932202.

It is an arithmetic number, because the mean of its divisors is an integer number (3034086580).

Almost surely, 2^20781732332 is an apocalyptic number.

It is an amenable number.

20781732332 is a deficient number, since it is larger than the sum of its proper divisors (15627306628).

20781732332 is a wasteful number, since it uses less digits than its factorization.

20781732332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5858200 (or 5858198 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 38.

The spelling of 20781732332 in words is "twenty billion, seven hundred eighty-one million, seven hundred thirty-two thousand, three hundred thirty-two".