20252525431 has 4 divisors (see below), whose sum is σ = 20307709792. Its totient is φ = 20197341072.

The previous prime is 20252525417. The next prime is 20252525441. The reversal of 20252525431 is 13452525202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13452525202 = 2 ⋅6726262601.

It is a cyclic number.

It is not a de Polignac number, because 20252525431 - 2²¹ = 20250428279 is a prime.

It is a super-2 number, since 2×20252525431² (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 = 20252525393 and 20252525402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20252525411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27591630 + ... + 27592363.

It is an arithmetic number, because the mean of its divisors is an integer number (5076927448).

Almost surely, 2^20252525431 is an apocalyptic number.

20252525431 is a deficient number, since it is larger than the sum of its proper divisors (55184361).

20252525431 is an equidigital number, since it uses as much as digits as its factorization.

20252525431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55184360.

The product of its (nonzero) digits is 24000, while the sum is 31.

The spelling of 20252525431 in words is "twenty billion, two hundred fifty-two million, five hundred twenty-five thousand, four hundred thirty-one".