20950246564 has 81 divisors (see below), whose sum is σ = 42043038723. Its totient is φ = 9129167424.

The previous prime is 20950246553. The next prime is 20950246589. The reversal of 20950246564 is 46564205902.

The square root of 20950246564 is 144742.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 535552164 + 20414694400 = 23142^2 + 142880^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20950246564.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 71502402 + ... + 71502694.

Almost surely, 2^20950246564 is an apocalyptic number.

20950246564 is the 144742-nd square number.

It is an amenable number.

20950246564 is an abundant number, since it is smaller than the sum of its proper divisors (21092792159).

20950246564 is a wasteful number, since it uses less digits than its factorization.

20950246564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 20950246564 in words is "twenty billion, nine hundred fifty million, two hundred forty-six thousand, five hundred sixty-four".