20522525431 has 4 divisors (see below), whose sum is σ = 20579691600. Its totient is φ = 20465359264.

The previous prime is 20522525417. The next prime is 20522525447. The reversal of 20522525431 is 13452522502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20522525431 - 2²³ = 20514136823 is a prime.

It is a super-2 number, since 2×20522525431² (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 = 20522525393 and 20522525402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20522525731) 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, 28582546 + ... + 28583263.

It is an arithmetic number, because the mean of its divisors is an integer number (5144922900).

Almost surely, 2^20522525431 is an apocalyptic number.

20522525431 is a deficient number, since it is larger than the sum of its proper divisors (57166169).

20522525431 is an equidigital number, since it uses as much as digits as its factorization.

20522525431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57166168.

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

The spelling of 20522525431 in words is "twenty billion, five hundred twenty-two million, five hundred twenty-five thousand, four hundred thirty-one".