20535958953 has 6 divisors (see below), whose sum is σ = 29663051834. Its totient is φ = 13690639296.

The previous prime is 20535958951. The next prime is 20535958957. The reversal of 20535958953 is 35985953502.

20535958953 is a `hidden beast` number, since 2 + 0 + 5 + 3 + 5 + 9 + 589 + 53 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13299394329 + 7236564624 = 115323^2 + 85068^2 .

It is not a de Polignac number, because 20535958953 - 2¹ = 20535958951 is a prime.

It is a super-2 number, since 2×20535958953² (a number of 21 digits) contains 22 as substring.

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 20535958953.

It is not an unprimeable number, because it can be changed into a prime (20535958951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1140886600 + ... + 1140886617.

Almost surely, 2^20535958953 is an apocalyptic number.

It is an amenable number.

20535958953 is a deficient number, since it is larger than the sum of its proper divisors (9127092881).

20535958953 is a wasteful number, since it uses less digits than its factorization.

20535958953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281773223 (or 2281773220 counting only the distinct ones).

The product of its (nonzero) digits is 7290000, while the sum is 54.

The spelling of 20535958953 in words is "twenty billion, five hundred thirty-five million, nine hundred fifty-eight thousand, nine hundred fifty-three".