21442014 has 24 divisors (see below), whose sum is σ = 50681592. Its totient is φ = 6497520.

The previous prime is 21442009. The next prime is 21442019. The reversal of 21442014 is 41024412.

It is an interprime number because it is at equal distance from previous prime (21442009) and next prime (21442019).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53949 + ... + 54344.

It is an arithmetic number, because the mean of its divisors is an integer number (2111733).

Almost surely, 2^21442014 is an apocalyptic number.

21442014 is an abundant number, since it is smaller than the sum of its proper divisors (29239578).

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

21442014 is a wasteful number, since it uses less digits than its factorization.

21442014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108312 (or 108309 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 21442014 is about 4630.5522348852. The cubic root of 21442014 is about 277.8146807624.

Adding to 21442014 its reverse (41024412), we get a palindrome (62466426).

The spelling of 21442014 in words is "twenty-one million, four hundred forty-two thousand, fourteen".