21422430213555 has 128 divisors (see below), whose sum is σ = 41463493263360. Its totient is φ = 9232674232320.

The previous prime is 21422430213539. The next prime is 21422430213557. The reversal of 21422430213555 is 55531203422412.

It is not a de Polignac number, because 21422430213555 - 2⁴ = 21422430213539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21422430213557) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 650350276 + ... + 650383214.

It is an arithmetic number, because the mean of its divisors is an integer number (323933541120).

Almost surely, 2^{21422430213555} is an apocalyptic number.

21422430213555 is a deficient number, since it is larger than the sum of its proper divisors (20041063049805).

21422430213555 is a wasteful number, since it uses less digits than its factorization.

21422430213555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36841.

The product of its (nonzero) digits is 288000, while the sum is 39.

Adding to 21422430213555 its reverse (55531203422412), we get a palindrome (76953633635967).

The spelling of 21422430213555 in words is "twenty-one trillion, four hundred twenty-two billion, four hundred thirty million, two hundred thirteen thousand, five hundred fifty-five".