21338222652 has 36 divisors (see below), whose sum is σ = 54300300600. Its totient is φ = 7065002592.

The previous prime is 21338222651. The next prime is 21338222713. The reversal of 21338222652 is 25622283312.

21338222652 is a `hidden beast` number, since 2 + 1 + 3 + 382 + 226 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21338222651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1983658 + ... + 1994385.

Almost surely, 2^21338222652 is an apocalyptic number.

It is an amenable number.

21338222652 is an abundant number, since it is smaller than the sum of its proper divisors (32962077948).

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

21338222652 is a wasteful number, since it uses less digits than its factorization.

21338222652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3978202 (or 3978197 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The spelling of 21338222652 in words is "twenty-one billion, three hundred thirty-eight million, two hundred twenty-two thousand, six hundred fifty-two".