20744678740 has 48 divisors (see below), whose sum is σ = 46384228800. Its totient is φ = 7766108672.

The previous prime is 20744678737. The next prime is 20744678753. The reversal of 20744678740 is 4787644702.

It is a congruent 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, 109570 + ... + 231289.

It is an arithmetic number, because the mean of its divisors is an integer number (966338100).

Almost surely, 2^20744678740 is an apocalyptic number.

20744678740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20744678740 is an abundant number, since it is smaller than the sum of its proper divisors (25639550060).

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

20744678740 is a wasteful number, since it uses less digits than its factorization.

20744678740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341064 (or 341062 counting only the distinct ones).

The product of its (nonzero) digits is 2107392, while the sum is 49.

The spelling of 20744678740 in words is "twenty billion, seven hundred forty-four million, six hundred seventy-eight thousand, seven hundred forty".