20102534125 has 16 divisors (see below), whose sum is σ = 25160316480. Its totient is φ = 16035646800.

The previous prime is 20102534117. The next prime is 20102534131. The reversal of 20102534125 is 52143520102.

It is not a de Polignac number, because 20102534125 - 2³ = 20102534117 is a prime.

It is a super-2 number, since 2×20102534125² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 20102534125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188355 + ... + 275104.

It is an arithmetic number, because the mean of its divisors is an integer number (1572519780).

Almost surely, 2^20102534125 is an apocalyptic number.

20102534125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20102534125 is a deficient number, since it is larger than the sum of its proper divisors (5057782355).

20102534125 is an equidigital number, since it uses as much as digits as its factorization.

20102534125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463821 (or 463811 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 20102534125 in words is "twenty billion, one hundred two million, five hundred thirty-four thousand, one hundred twenty-five".