21469722 has 16 divisors (see below), whose sum is σ = 42988320. Its totient is φ = 7148432.

The previous prime is 21469699. The next prime is 21469729. The reversal of 21469722 is 22796412.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (21469729) 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, 6304 + ... + 9092.

It is an arithmetic number, because the mean of its divisors is an integer number (2686770).

Almost surely, 2^21469722 is an apocalyptic number.

21469722 is an abundant number, since it is smaller than the sum of its proper divisors (21518598).

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

21469722 is a wasteful number, since it uses less digits than its factorization.

21469722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4077.

The product of its digits is 12096, while the sum is 33.

The square root of 21469722 is about 4633.5431367367. The cubic root of 21469722 is about 277.9342960160.

The spelling of 21469722 in words is "twenty-one million, four hundred sixty-nine thousand, seven hundred twenty-two".