21852668292 has 96 divisors (see below), whose sum is σ = 66447988992. Its totient is φ = 5424316416.

The previous prime is 21852668263. The next prime is 21852668293. The reversal of 21852668292 is 29286625812.

It is a super-2 number, since 2×21852668292² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (21852668293) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 570013 + ... + 607140.

It is an arithmetic number, because the mean of its divisors is an integer number (692166552).

Almost surely, 2^21852668292 is an apocalyptic number.

It is an amenable number.

21852668292 is an abundant number, since it is smaller than the sum of its proper divisors (44595320700).

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

21852668292 is a wasteful number, since it uses less digits than its factorization.

21852668292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177197 (or 1177195 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 51.

The spelling of 21852668292 in words is "twenty-one billion, eight hundred fifty-two million, six hundred sixty-eight thousand, two hundred ninety-two".