20355104302631 has 12 divisors (see below), whose sum is σ = 24318385485072. Its totient is φ = 16688656940736.

The previous prime is 20355104302601. The next prime is 20355104302633. The reversal of 20355104302631 is 13620340155302.

It is a happy number.

It is not a de Polignac number, because 20355104302631 - 2²⁶ = 20355037193767 is a prime.

It is a super-2 number, since 2×20355104302631² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20355104302591 and 20355104302600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20355104302633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2748457586 + ... + 2748464991.

It is an arithmetic number, because the mean of its divisors is an integer number (2026532123756).

Almost surely, 2^{20355104302631} is an apocalyptic number.

20355104302631 is a deficient number, since it is larger than the sum of its proper divisors (3963281182441).

20355104302631 is an equidigital number, since it uses as much as digits as its factorization.

20355104302631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5496922630 (or 5496922607 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 20355104302631 its reverse (13620340155302), we get a palindrome (33975444457933).

The spelling of 20355104302631 in words is "twenty trillion, three hundred fifty-five billion, one hundred four million, three hundred two thousand, six hundred thirty-one".