21869422 has 8 divisors (see below), whose sum is σ = 33935400. Its totient is φ = 10557624.

The previous prime is 21869401. The next prime is 21869423. The reversal of 21869422 is 22496812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21869422² = 956543237228168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21869423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188472 + ... + 188587.

It is an arithmetic number, because the mean of its divisors is an integer number (4241925).

Almost surely, 2^21869422 is an apocalyptic number.

21869422 is a deficient number, since it is larger than the sum of its proper divisors (12065978).

21869422 is a wasteful number, since it uses less digits than its factorization.

21869422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377090.

The product of its digits is 13824, while the sum is 34.

The square root of 21869422 is about 4676.4753821655. The cubic root of 21869422 is about 279.6484618922.

The spelling of 21869422 in words is "twenty-one million, eight hundred sixty-nine thousand, four hundred twenty-two".