20533102525 has 12 divisors (see below), whose sum is σ = 27419589652. Its totient is φ = 15162906240.

The previous prime is 20533102523. The next prime is 20533102549. The reversal of 20533102525 is 52520133502.

It can be written as a sum of positive squares in 6 ways, for example, as 997170084 + 19535932441 = 31578^2 + 139771^2 .

It is not a de Polignac number, because 20533102525 - 2¹ = 20533102523 is a prime.

It is a super-2 number, since 2×20533102525² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20533102493 and 20533102502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533102523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31589064 + ... + 31589713.

Almost surely, 2^20533102525 is an apocalyptic number.

20533102525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20533102525 is a deficient number, since it is larger than the sum of its proper divisors (6886487127).

20533102525 is a wasteful number, since it uses less digits than its factorization.

20533102525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63178800 (or 63178795 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The spelling of 20533102525 in words is "twenty billion, five hundred thirty-three million, one hundred two thousand, five hundred twenty-five".