20489627792 has 10 divisors (see below), whose sum is σ = 39698653878. Its totient is φ = 10244813888.

The previous prime is 20489627777. The next prime is 20489627813. The reversal of 20489627792 is 29772698402.

It can be written as a sum of positive squares in only one way, i.e., 20438705296 + 50922496 = 142964^2 + 7136^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640300853 + ... + 640300884.

Almost surely, 2^20489627792 is an apocalyptic number.

It is an amenable number.

20489627792 is a deficient number, since it is larger than the sum of its proper divisors (19209026086).

20489627792 is a wasteful number, since it uses less digits than its factorization.

20489627792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280601745 (or 1280601739 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 56.

The spelling of 20489627792 in words is "twenty billion, four hundred eighty-nine million, six hundred twenty-seven thousand, seven hundred ninety-two".