21345847418022 has 48 divisors (see below), whose sum is σ = 44734585049856. Its totient is φ = 6788774605200.

The previous prime is 21345847417949. The next prime is 21345847418023. The reversal of 21345847418022 is 22081474854312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21345847418023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25661178 + ... + 26479949.

It is an arithmetic number, because the mean of its divisors is an integer number (931970521872).

Almost surely, 2^{21345847418022} is an apocalyptic number.

21345847418022 is an abundant number, since it is smaller than the sum of its proper divisors (23388737631834).

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

21345847418022 is a wasteful number, since it uses less digits than its factorization.

21345847418022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52141265 (or 52141234 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 51.

The spelling of 21345847418022 in words is "twenty-one trillion, three hundred forty-five billion, eight hundred forty-seven million, four hundred eighteen thousand, twenty-two".