20102521133 has 4 divisors (see below), whose sum is σ = 20108456220. Its totient is φ = 20096586048.

The previous prime is 20102521099. The next prime is 20102521139. The reversal of 20102521133 is 33112520102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17736379684 + 2366141449 = 133178^2 + 48643^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102521133 - 2⁸ = 20102520877 is a prime.

It is a super-2 number, since 2×20102521133² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102521139) 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, 2962460 + ... + 2969237.

It is an arithmetic number, because the mean of its divisors is an integer number (5027114055).

Almost surely, 2^20102521133 is an apocalyptic number.

It is an amenable number.

20102521133 is a deficient number, since it is larger than the sum of its proper divisors (5935087).

20102521133 is an equidigital number, since it uses as much as digits as its factorization.

20102521133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5935086.

The product of its (nonzero) digits is 360, while the sum is 20.

The spelling of 20102521133 in words is "twenty billion, one hundred two million, five hundred twenty-one thousand, one hundred thirty-three".