20430323125 has 20 divisors (see below), whose sum is σ = 25635853276. Its totient is φ = 16276320000.

The previous prime is 20430323063. The next prime is 20430323143. The reversal of 20430323125 is 52132303402.

It can be written as a sum of positive squares in 10 ways, for example, as 7600003684 + 12830319441 = 87178^2 + 113271^2 .

It is not a de Polignac number, because 20430323125 - 2¹⁵ = 20430290357 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20430323125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 82807 + ... + 218443.

Almost surely, 2^20430323125 is an apocalyptic number.

20430323125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20430323125 is a deficient number, since it is larger than the sum of its proper divisors (5205530151).

20430323125 is an equidigital number, since it uses as much as digits as its factorization.

20430323125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135898 (or 135883 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 20430323125 its reverse (52132303402), we get a palindrome (72562626527).

The spelling of 20430323125 in words is "twenty billion, four hundred thirty million, three hundred twenty-three thousand, one hundred twenty-five".