20953513316 has 12 divisors (see below), whose sum is σ = 36785802732. Its totient is φ = 10443283968.

The previous prime is 20953513313. The next prime is 20953513331. The reversal of 20953513316 is 61331535902.

It can be written as a sum of positive squares in 2 ways, for example, as 1109156416 + 19844356900 = 33304^2 + 140870^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20953513316.

It is not an unprimeable number, because it can be changed into a prime (20953513313) 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, 8366765 + ... + 8369268.

It is an arithmetic number, because the mean of its divisors is an integer number (3065483561).

Almost surely, 2^20953513316 is an apocalyptic number.

It is an amenable number.

20953513316 is a deficient number, since it is larger than the sum of its proper divisors (15832289416).

20953513316 is a wasteful number, since it uses less digits than its factorization.

20953513316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16736350 (or 16736348 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 38.

The spelling of 20953513316 in words is "twenty billion, nine hundred fifty-three million, five hundred thirteen thousand, three hundred sixteen".