21662119 has 4 divisors (see below), whose sum is σ = 21677800. Its totient is φ = 21646440.

The previous prime is 21662117. The next prime is 21662129. The reversal of 21662119 is 91126612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21662119 - 2¹ = 21662117 is a prime.

It is a super-2 number, since 2×21662119² = 938494799140322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21662117) 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, 5544 + ... + 8605.

It is an arithmetic number, because the mean of its divisors is an integer number (5419450).

Almost surely, 2^21662119 is an apocalyptic number.

21662119 is a deficient number, since it is larger than the sum of its proper divisors (15681).

21662119 is a wasteful number, since it uses less digits than its factorization.

21662119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15680.

The product of its digits is 1296, while the sum is 28.

The square root of 21662119 is about 4654.2581578593. The cubic root of 21662119 is about 278.7620475130.

The spelling of 21662119 in words is "twenty-one million, six hundred sixty-two thousand, one hundred nineteen".