21261622062630 has 32 divisors (see below), whose sum is σ = 52787475468000. Its totient is φ = 5474256714752.

The previous prime is 21261622062599. The next prime is 21261622062649. The reversal of 21261622062630 is 3626022616212.

It is a super-2 number, since 2×21261622062630² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12219322155 + ... + 12219323894.

It is an arithmetic number, because the mean of its divisors is an integer number (1649608608375).

Almost surely, 2^{21261622062630} is an apocalyptic number.

21261622062630 is an abundant number, since it is smaller than the sum of its proper divisors (31525853405370).

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

21261622062630 is a wasteful number, since it uses less digits than its factorization.

21261622062630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24438646088.

The product of its (nonzero) digits is 124416, while the sum is 39.

Adding to 21261622062630 its reverse (3626022616212), we get a palindrome (24887644678842).

The spelling of 21261622062630 in words is "twenty-one trillion, two hundred sixty-one billion, six hundred twenty-two million, sixty-two thousand, six hundred thirty".