20954299536 has 75 divisors (see below), whose sum is σ = 60662908713. Its totient is φ = 6983029440.

The previous prime is 20954299517. The next prime is 20954299573. The reversal of 20954299536 is 63599245902.

It is a happy number.

The square root of 20954299536 is 144756.

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

20954299536 is a `hidden beast` number, since 2 + 0 + 9 + 542 + 9 + 95 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1242139536 + 19712160000 = 35244^2 + 140400^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 5209206 + ... + 5213226.

Almost surely, 2^20954299536 is an apocalyptic number.

20954299536 is the 144756-th square number.

It is an amenable number.

20954299536 is an abundant number, since it is smaller than the sum of its proper divisors (39708609177).

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

20954299536 is an frugal number, since it uses more digits than its factorization.

20954299536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8062 (or 4026 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 54.

The spelling of 20954299536 in words is "twenty billion, nine hundred fifty-four million, two hundred ninety-nine thousand, five hundred thirty-six".