20012583125 has 20 divisors (see below), whose sum is σ = 25683637980. Its totient is φ = 15577344000.

The previous prime is 20012583121. The next prime is 20012583133. The reversal of 20012583125 is 52138521002.

It can be written as a sum of positive squares in 10 ways, for example, as 4921443409 + 15091139716 = 70153^2 + 122846^2 .

It is not a de Polignac number, because 20012583125 - 2² = 20012583121 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012583121) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 409580 + ... + 455829.

It is an arithmetic number, because the mean of its divisors is an integer number (1284181899).

Almost surely, 2^20012583125 is an apocalyptic number.

20012583125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20012583125 is a deficient number, since it is larger than the sum of its proper divisors (5671054855).

20012583125 is an frugal number, since it uses more digits than its factorization.

20012583125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865466 (or 865451 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 20012583125 in words is "twenty billion, twelve million, five hundred eighty-three thousand, one hundred twenty-five".