21622014 has 24 divisors (see below), whose sum is σ = 47077992. Its totient is φ = 7171920.

The previous prime is 21621997. The next prime is 21622033. The reversal of 21622014 is 41022612.

It is a super-2 number, since 2×21622014² = 935022978832392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 952 + ... + 6644.

It is an arithmetic number, because the mean of its divisors is an integer number (1961583).

Almost surely, 2^21622014 is an apocalyptic number.

21622014 is an abundant number, since it is smaller than the sum of its proper divisors (25455978).

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

21622014 is a wasteful number, since it uses less digits than its factorization.

21622014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5912 (or 5909 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 21622014 is about 4649.9477416418. The cubic root of 21622014 is about 278.5899089459.

Adding to 21622014 its reverse (41022612), we get a palindrome (62644626).

The spelling of 21622014 in words is "twenty-one million, six hundred twenty-two thousand, fourteen".