21267842022 has 48 divisors (see below), whose sum is σ = 52927929600. Its totient is φ = 6045983856.

The previous prime is 21267841999. The next prime is 21267842023. The reversal of 21267842022 is 22024876212.

It is a super-2 number, since 2×21267842022² (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 (21267842023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 399028 + ... + 449175.

It is an arithmetic number, because the mean of its divisors is an integer number (1102665200).

Almost surely, 2^21267842022 is an apocalyptic number.

21267842022 is an abundant number, since it is smaller than the sum of its proper divisors (31660087578).

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

21267842022 is a wasteful number, since it uses less digits than its factorization.

21267842022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848417 (or 848414 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The spelling of 21267842022 in words is "twenty-one billion, two hundred sixty-seven million, eight hundred forty-two thousand, twenty-two".