20423514415525 has 18 divisors (see below), whose sum is σ = 27423099953430. Its totient is φ = 15081979872960.

The previous prime is 20423514415519. The next prime is 20423514415547. The reversal of 20423514415525 is 52551441532402.

It can be written as a sum of positive squares in 9 ways, for example, as 17128614200929 + 3294900214596 = 4138673^2 + 1815186^2 .

It is not a de Polignac number, because 20423514415525 - 2³⁷ = 20286075462053 is a prime.

It is a super-2 number, since 2×20423514415525² (a number of 27 digits) contains 22 as substring.

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 17 ways as a sum of consecutive naturals, for example, 2416979730 + ... + 2416988179.

Almost surely, 2^{20423514415525} is an apocalyptic number.

20423514415525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20423514415525 is a deficient number, since it is larger than the sum of its proper divisors (6999585537905).

20423514415525 is a wasteful number, since it uses less digits than its factorization.

20423514415525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4833967945 (or 4833967927 counting only the distinct ones).

The product of its (nonzero) digits is 960000, while the sum is 43.

Adding to 20423514415525 its reverse (52551441532402), we get a palindrome (72974955947927).

The spelling of 20423514415525 in words is "twenty trillion, four hundred twenty-three billion, five hundred fourteen million, four hundred fifteen thousand, five hundred twenty-five".