21113203365364 has 48 divisors (see below), whose sum is σ = 43026030835200. Its totient is φ = 8963756373600.

The previous prime is 21113203365337. The next prime is 21113203365391. The reversal of 21113203365364 is 46356330231112.

It is an interprime number because it is at equal distance from previous prime (21113203365337) and next prime (21113203365391).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177792954 + ... + 177911665.

It is an arithmetic number, because the mean of its divisors is an integer number (896375642400).

Almost surely, 2^{21113203365364} is an apocalyptic number.

It is an amenable number.

21113203365364 is an abundant number, since it is smaller than the sum of its proper divisors (21912827469836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21113203365364 is a wasteful number, since it uses less digits than its factorization.

21113203365364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355704724 (or 355704722 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 40.

Adding to 21113203365364 its reverse (46356330231112), we get a palindrome (67469533596476).

The spelling of 21113203365364 in words is "twenty-one trillion, one hundred thirteen billion, two hundred three million, three hundred sixty-five thousand, three hundred sixty-four".