21622727023455 has 16 divisors (see below), whose sum is σ = 34825478229504. Its totient is φ = 11455749415200.

The previous prime is 21622727023433. The next prime is 21622727023481. The reversal of 21622727023455 is 55432072722612.

It is a happy number.

It is not a de Polignac number, because 21622727023455 - 2⁹ = 21622727022943 is a prime.

It is a super-2 number, since 2×21622727023455² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4773226659 + ... + 4773231188.

It is an arithmetic number, because the mean of its divisors is an integer number (2176592389344).

Almost surely, 2^{21622727023455} is an apocalyptic number.

21622727023455 is a deficient number, since it is larger than the sum of its proper divisors (13202751206049).

21622727023455 is a wasteful number, since it uses less digits than its factorization.

21622727023455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9546458006.

The product of its (nonzero) digits is 2822400, while the sum is 48.

The spelling of 21622727023455 in words is "twenty-one trillion, six hundred twenty-two billion, seven hundred twenty-seven million, twenty-three thousand, four hundred fifty-five".