21453181622 has 8 divisors (see below), whose sum is σ = 32707309872. Its totient is φ = 10550745000.

The previous prime is 21453181613. The next prime is 21453181669. The reversal of 21453181622 is 22618135412.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87922754 + ... + 87922997.

It is an arithmetic number, because the mean of its divisors is an integer number (4088413734).

Almost surely, 2^21453181622 is an apocalyptic number.

21453181622 is a deficient number, since it is larger than the sum of its proper divisors (11254128250).

21453181622 is a wasteful number, since it uses less digits than its factorization.

21453181622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175845814.

The product of its digits is 23040, while the sum is 35.

The spelling of 21453181622 in words is "twenty-one billion, four hundred fifty-three million, one hundred eighty-one thousand, six hundred twenty-two".