20215222927616 has 72 divisors (see below), whose sum is σ = 42731300183040. Its totient is φ = 9511664820224.

The previous prime is 20215222927597. The next prime is 20215222927631. The reversal of 20215222927616 is 61672922251202.

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, 29951825 + ... + 30619311.

It is an arithmetic number, because the mean of its divisors is an integer number (593490280320).

Almost surely, 2^{20215222927616} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20215222927616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21365650091520).

20215222927616 is an abundant number, since it is smaller than the sum of its proper divisors (22516077255424).

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

20215222927616 is an equidigital number, since it uses as much as digits as its factorization.

20215222927616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674479 (or 674465 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 20215222927616 in words is "twenty trillion, two hundred fifteen billion, two hundred twenty-two million, nine hundred twenty-seven thousand, six hundred sixteen".