20522335531 has 4 divisors (see below), whose sum is σ = 20999599192. Its totient is φ = 20045071872.

The previous prime is 20522335517. The next prime is 20522335571. The reversal of 20522335531 is 13553322502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13553322502 = 2 ⋅6776661251.

It is a cyclic number.

It is not a de Polignac number, because 20522335531 - 2⁷ = 20522335403 is a prime.

It is a super-2 number, since 2×20522335531² (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 = 20522335493 and 20522335502.

It is not an unprimeable number, because it can be changed into a prime (20522335571) 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, 238631766 + ... + 238631851.

It is an arithmetic number, because the mean of its divisors is an integer number (5249899798).

Almost surely, 2^20522335531 is an apocalyptic number.

20522335531 is a deficient number, since it is larger than the sum of its proper divisors (477263661).

20522335531 is an equidigital number, since it uses as much as digits as its factorization.

20522335531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477263660.

The product of its (nonzero) digits is 27000, while the sum is 31.

The spelling of 20522335531 in words is "twenty billion, five hundred twenty-two million, three hundred thirty-five thousand, five hundred thirty-one".