20702173264 has 10 divisors (see below), whose sum is σ = 40110460730. Its totient is φ = 10351086624.

The previous prime is 20702173259. The next prime is 20702173277. The reversal of 20702173264 is 46237120702.

It can be written as a sum of positive squares in only one way, i.e., 11601013264 + 9101160000 = 107708^2 + 95400^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646942899 + ... + 646942930.

It is an arithmetic number, because the mean of its divisors is an integer number (4011046073).

Almost surely, 2^20702173264 is an apocalyptic number.

It is an amenable number.

20702173264 is a deficient number, since it is larger than the sum of its proper divisors (19408287466).

20702173264 is a wasteful number, since it uses less digits than its factorization.

20702173264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293885837 (or 1293885831 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

Adding to 20702173264 its reverse (46237120702), we get a palindrome (66939293966).

The spelling of 20702173264 in words is "twenty billion, seven hundred two million, one hundred seventy-three thousand, two hundred sixty-four".