21494142 has 24 divisors (see below), whose sum is σ = 46688616. Its totient is φ = 7146576.

The previous prime is 21494131. The next prime is 21494159. The reversal of 21494142 is 24149412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7128 + ... + 9684.

It is an arithmetic number, because the mean of its divisors is an integer number (1945359).

Almost surely, 2^21494142 is an apocalyptic number.

21494142 is an abundant number, since it is smaller than the sum of its proper divisors (25194474).

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

21494142 is a wasteful number, since it uses less digits than its factorization.

21494142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3032 (or 3029 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 21494142 is about 4636.1775203286. The cubic root of 21494142 is about 278.0396317047.

The spelling of 21494142 in words is "twenty-one million, four hundred ninety-four thousand, one hundred forty-two".