20125204525 has 6 divisors (see below), whose sum is σ = 24955253642. Its totient is φ = 16100163600.

The previous prime is 20125204507. The next prime is 20125204543. The reversal of 20125204525 is 52540252102.

It is an interprime number because it is at equal distance from previous prime (20125204507) and next prime (20125204543).

It can be written as a sum of positive squares in 3 ways, for example, as 6829039044 + 13296165481 = 82638^2 + 115309^2 .

It is not a de Polignac number, because 20125204525 - 2²¹ = 20123107373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20125204493 and 20125204502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 402504066 + ... + 402504115.

Almost surely, 2^20125204525 is an apocalyptic number.

20125204525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20125204525 is a deficient number, since it is larger than the sum of its proper divisors (4830049117).

20125204525 is an equidigital number, since it uses as much as digits as its factorization.

20125204525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805008191 (or 805008186 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

Adding to 20125204525 its reverse (52540252102), we get a palindrome (72665456627).

The spelling of 20125204525 in words is "twenty billion, one hundred twenty-five million, two hundred four thousand, five hundred twenty-five".