20345032402556 has 12 divisors (see below), whose sum is σ = 35620343554992. Its totient is φ = 10167791386848.

The previous prime is 20345032402553. The next prime is 20345032402561. The reversal of 20345032402556 is 65520423054302.

It is a super-2 number, since 2×20345032402556² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345032402553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181193920 + ... + 1181211143.

It is an arithmetic number, because the mean of its divisors is an integer number (2968361962916).

Almost surely, 2^{20345032402556} is an apocalyptic number.

It is an amenable number.

20345032402556 is a deficient number, since it is larger than the sum of its proper divisors (15275311152436).

20345032402556 is a wasteful number, since it uses less digits than its factorization.

20345032402556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362407220 (or 2362407218 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 41.

Adding to 20345032402556 its reverse (65520423054302), we get a palindrome (85865455456858).

The spelling of 20345032402556 in words is "twenty trillion, three hundred forty-five billion, thirty-two million, four hundred two thousand, five hundred fifty-six".