21240266022 has 36 divisors (see below), whose sum is σ = 48570207660. Its totient is φ = 6707450376.

The previous prime is 21240266011. The next prime is 21240266023. The reversal of 21240266022 is 22066204212.

It is a happy number.

21240266022 is a `hidden beast` number, since 2 + 12 + 40 + 2 + 6 + 602 + 2 = 666.

It is a super-2 number, since 2×21240266022² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21240266023) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1627872 + ... + 1640867.

It is an arithmetic number, because the mean of its divisors is an integer number (1349172435).

Almost surely, 2^21240266022 is an apocalyptic number.

21240266022 is an abundant number, since it is smaller than the sum of its proper divisors (27329941638).

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

21240266022 is a wasteful number, since it uses less digits than its factorization.

21240266022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3268785 (or 3268763 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The spelling of 21240266022 in words is "twenty-one billion, two hundred forty million, two hundred sixty-six thousand, twenty-two".