20035505125 has 16 divisors (see below), whose sum is σ = 26475154992. Its totient is φ = 15085555200.

The previous prime is 20035505081. The next prime is 20035505153. The reversal of 20035505125 is 52150553002.

It can be written as a sum of positive squares in 8 ways, for example, as 9525564801 + 10509940324 = 97599^2 + 102518^2 .

It is not a de Polignac number, because 20035505125 - 2⁹ = 20035504613 is a prime.

It is a super-2 number, since 2×20035505125² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20035505093 and 20035505102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4712112 + ... + 4716361.

It is an arithmetic number, because the mean of its divisors is an integer number (1654697187).

Almost surely, 2^20035505125 is an apocalyptic number.

20035505125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20035505125 is a deficient number, since it is larger than the sum of its proper divisors (6439649867).

20035505125 is an equidigital number, since it uses as much as digits as its factorization.

20035505125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9428505 (or 9428495 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 28.

The spelling of 20035505125 in words is "twenty billion, thirty-five million, five hundred five thousand, one hundred twenty-five".