20513124330025 has 24 divisors (see below), whose sum is σ = 25549381011744. Its totient is φ = 16337674905600.

The previous prime is 20513124329911. The next prime is 20513124330053. The reversal of 20513124330025 is 52003342131502.

It is not a de Polignac number, because 20513124330025 - 2¹⁵ = 20513124297257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3716194 + ... + 7405156.

It is an arithmetic number, because the mean of its divisors is an integer number (1064557542156).

Almost surely, 2^{20513124330025} is an apocalyptic number.

20513124330025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20513124330025 is a deficient number, since it is larger than the sum of its proper divisors (5036256681719).

20513124330025 is a wasteful number, since it uses less digits than its factorization.

20513124330025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3689961 (or 3689956 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 20513124330025 its reverse (52003342131502), we get a palindrome (72516466461527).

The spelling of 20513124330025 in words is "twenty trillion, five hundred thirteen billion, one hundred twenty-four million, three hundred thirty thousand, twenty-five".