21222737663 has 8 divisors (see below), whose sum is σ = 21318482016. Its totient is φ = 21127033600.

The previous prime is 21222737659. The next prime is 21222737687. The reversal of 21222737663 is 36673722212.

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

It is a cyclic number.

It is not a de Polignac number, because 21222737663 - 2² = 21222737659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21222737663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222737633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1652798 + ... + 1665588.

It is an arithmetic number, because the mean of its divisors is an integer number (2664810252).

Almost surely, 2^21222737663 is an apocalyptic number.

21222737663 is a deficient number, since it is larger than the sum of its proper divisors (95744353).

21222737663 is a wasteful number, since it uses less digits than its factorization.

21222737663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20145.

The product of its digits is 254016, while the sum is 41.

The spelling of 21222737663 in words is "twenty-one billion, two hundred twenty-two million, seven hundred thirty-seven thousand, six hundred sixty-three".