20740784744 has 16 divisors (see below), whose sum is σ = 39013222020. Its totient is φ = 10337258880.

The previous prime is 20740784723. The next prime is 20740784749. The reversal of 20740784744 is 44748704702.

It can be written as a sum of positive squares in 2 ways, for example, as 18889203844 + 1851580900 = 137438^2 + 43030^2 .

It is not an unprimeable number, because it can be changed into a prime (20740784749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4139027 + ... + 4144034.

Almost surely, 2^20740784744 is an apocalyptic number.

It is an amenable number.

20740784744 is a deficient number, since it is larger than the sum of its proper divisors (18272437276).

20740784744 is a wasteful number, since it uses less digits than its factorization.

20740784744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8283380 (or 8283376 counting only the distinct ones).

The product of its (nonzero) digits is 1404928, while the sum is 47.

The spelling of 20740784744 in words is "twenty billion, seven hundred forty million, seven hundred eighty-four thousand, seven hundred forty-four".