21462222556 has 12 divisors (see below), whose sum is σ = 38195481240. Its totient is φ = 10549227920.

The previous prime is 21462222547. The next prime is 21462222623. The reversal of 21462222556 is 65522226412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45470575 + ... + 45471046.

It is an arithmetic number, because the mean of its divisors is an integer number (3182956770).

Almost surely, 2^21462222556 is an apocalyptic number.

It is an amenable number.

21462222556 is a deficient number, since it is larger than the sum of its proper divisors (16733258684).

21462222556 is a wasteful number, since it uses less digits than its factorization.

21462222556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90941684 (or 90941682 counting only the distinct ones).

The product of its digits is 115200, while the sum is 37.

Adding to 21462222556 its reverse (65522226412), we get a palindrome (86984448968).

The spelling of 21462222556 in words is "twenty-one billion, four hundred sixty-two million, two hundred twenty-two thousand, five hundred fifty-six".