21614042 has 4 divisors (see below), whose sum is σ = 32421066. Its totient is φ = 10807020.

The previous prime is 21614029. The next prime is 21614057. The reversal of 21614042 is 24041612.

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

It can be written as a sum of positive squares in only one way, i.e., 21613201 + 841 = 4649^2 + 29^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5403509 + ... + 5403512.

Almost surely, 2^21614042 is an apocalyptic number.

21614042 is a deficient number, since it is larger than the sum of its proper divisors (10807024).

21614042 is a wasteful number, since it uses less digits than its factorization.

21614042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10807023.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 21614042 is about 4649.0904486792. The cubic root of 21614042 is about 278.5556661943. Note that the first 3 decimals are identical.

Adding to 21614042 its reverse (24041612), we get a palindrome (45655654).

The spelling of 21614042 in words is "twenty-one million, six hundred fourteen thousand, forty-two".