21442702 has 4 divisors (see below), whose sum is σ = 32164056. Its totient is φ = 10721350.

The previous prime is 21442699. The next prime is 21442703. The reversal of 21442702 is 20724412.

It is a happy number.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5360674 + ... + 5360677.

It is an arithmetic number, because the mean of its divisors is an integer number (8041014).

Almost surely, 2^21442702 is an apocalyptic number.

21442702 is a deficient number, since it is larger than the sum of its proper divisors (10721354).

21442702 is a wasteful number, since it uses less digits than its factorization.

21442702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10721353.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 21442702 is about 4630.6265234847. The cubic root of 21442702 is about 277.8176521010.

The spelling of 21442702 in words is "twenty-one million, four hundred forty-two thousand, seven hundred two".