20681078732 has 48 divisors (see below), whose sum is σ = 39451130880. Its totient is φ = 9450043200.

The previous prime is 20681078707. The next prime is 20681078767. The reversal of 20681078732 is 23787018602.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 733007 + ... + 760697.

It is an arithmetic number, because the mean of its divisors is an integer number (821898560).

Almost surely, 2^20681078732 is an apocalyptic number.

It is an amenable number.

20681078732 is a deficient number, since it is larger than the sum of its proper divisors (18770052148).

20681078732 is a wasteful number, since it uses less digits than its factorization.

20681078732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28062 (or 28060 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 20681078732 in words is "twenty billion, six hundred eighty-one million, seventy-eight thousand, seven hundred thirty-two".