20202235531 has 2 divisors, whose sum is σ = 20202235532. Its totient is φ = 20202235530.

The previous prime is 20202235523. The next prime is 20202235561. The reversal of 20202235531 is 13553220202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20202235531 - 2³ = 20202235523 is a prime.

It is a super-2 number, since 2×20202235531² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20202235496 and 20202235505.

It is not a weakly prime, because it can be changed into another prime (20202235561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101117765 + 10101117766.

It is an arithmetic number, because the mean of its divisors is an integer number (10101117766).

Almost surely, 2^20202235531 is an apocalyptic number.

20202235531 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202235531 is an equidigital number, since it uses as much as digits as its factorization.

20202235531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 20202235531 its reverse (13553220202), we get a palindrome (33755455733).

The spelling of 20202235531 in words is "twenty billion, two hundred two million, two hundred thirty-five thousand, five hundred thirty-one".