21622067216345 has 8 divisors (see below), whose sum is σ = 25946524941000. Its totient is φ = 17297624252160.

The previous prime is 21622067216327. The next prime is 21622067216381. The reversal of 21622067216345 is 54361276022612.

It can be written as a sum of positive squares in 4 ways, for example, as 123887104576 + 21498180111769 = 351976^2 + 4636613^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21622067216345 - 2⁸ = 21622067216089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21622067216345.

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, 160496 + ... + 6577985.

It is an arithmetic number, because the mean of its divisors is an integer number (3243315617625).

Almost surely, 2^{21622067216345} is an apocalyptic number.

It is an amenable number.

21622067216345 is a deficient number, since it is larger than the sum of its proper divisors (4324457724655).

21622067216345 is an equidigital number, since it uses as much as digits as its factorization.

21622067216345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7380235.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 21622067216345 in words is "twenty-one trillion, six hundred twenty-two billion, sixty-seven million, two hundred sixteen thousand, three hundred forty-five".