20345435365216 has 48 divisors (see below), whose sum is σ = 43410988790064. Its totient is φ = 9330390710784.

The previous prime is 20345435365187. The next prime is 20345435365243. The reversal of 20345435365216 is 61256353454302.

It is a super-2 number, since 2×20345435365216² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20345435365216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155690410 + ... + 155821033.

It is an arithmetic number, because the mean of its divisors is an integer number (904395599793).

Almost surely, 2^{20345435365216} is an apocalyptic number.

20345435365216 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20345435365216 is an abundant number, since it is smaller than the sum of its proper divisors (23065553424848).

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

20345435365216 is a wasteful number, since it uses less digits than its factorization.

20345435365216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311511623 (or 311511615 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 49.

The spelling of 20345435365216 in words is "twenty trillion, three hundred forty-five billion, four hundred thirty-five million, three hundred sixty-five thousand, two hundred sixteen".