21404114 has 4 divisors (see below), whose sum is σ = 32106174. Its totient is φ = 10702056.

The previous prime is 21404101. The next prime is 21404147. The reversal of 21404114 is 41140412.

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., 19758025 + 1646089 = 4445^2 + 1283^2 .

It is a super-2 number, since 2×21404114² = 916272192249992, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21404092 and 21404101.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5351027 + ... + 5351030.

Almost surely, 2^21404114 is an apocalyptic number.

21404114 is a deficient number, since it is larger than the sum of its proper divisors (10702060).

21404114 is a wasteful number, since it uses less digits than its factorization.

21404114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10702059.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 21404114 is about 4626.4580404452. The cubic root of 21404114 is about 277.6508997211.

Adding to 21404114 its reverse (41140412), we get a palindrome (62544526).

The spelling of 21404114 in words is "twenty-one million, four hundred four thousand, one hundred fourteen".