21360021626 has 8 divisors (see below), whose sum is σ = 32055752160. Its totient is φ = 10674770908.

The previous prime is 21360021587. The next prime is 21360021703. The reversal of 21360021626 is 62612006312.

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

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, 2614856 + ... + 2623011.

It is an arithmetic number, because the mean of its divisors is an integer number (4006969020).

Almost surely, 2^21360021626 is an apocalyptic number.

21360021626 is a deficient number, since it is larger than the sum of its proper divisors (10695730534).

21360021626 is a wasteful number, since it uses less digits than its factorization.

21360021626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5239908.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 21360021626 its reverse (62612006312), we get a palindrome (83972027938).

The spelling of 21360021626 in words is "twenty-one billion, three hundred sixty million, twenty-one thousand, six hundred twenty-six".