20520252125231 has 16 divisors (see below), whose sum is σ = 21667198245600. Its totient is φ = 19433868027840.

The previous prime is 20520252125183. The next prime is 20520252125249. The reversal of 20520252125231 is 13252125202502.

It is not a de Polignac number, because 20520252125231 - 2⁶ = 20520252125167 is a prime.

It is a super-2 number, since 2×20520252125231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20520252121231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20506715 + ... + 21484083.

It is an arithmetic number, because the mean of its divisors is an integer number (1354199890350).

Almost surely, 2^{20520252125231} is an apocalyptic number.

20520252125231 is a deficient number, since it is larger than the sum of its proper divisors (1146946120369).

20520252125231 is an frugal number, since it uses more digits than its factorization.

20520252125231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980487 (or 980449 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 20520252125231 its reverse (13252125202502), we get a palindrome (33772377327733).

The spelling of 20520252125231 in words is "twenty trillion, five hundred twenty billion, two hundred fifty-two million, one hundred twenty-five thousand, two hundred thirty-one".