21749114 has 4 divisors (see below), whose sum is σ = 32623674. Its totient is φ = 10874556.

The previous prime is 21749113. The next prime is 21749149. The reversal of 21749114 is 41194712.

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., 21669025 + 80089 = 4655^2 + 283^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21749113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5437277 + ... + 5437280.

Almost surely, 2^21749114 is an apocalyptic number.

21749114 is a deficient number, since it is larger than the sum of its proper divisors (10874560).

21749114 is a wasteful number, since it uses less digits than its factorization.

21749114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10874559.

The product of its digits is 2016, while the sum is 29.

The square root of 21749114 is about 4663.5945364064. The cubic root of 21749114 is about 279.1347182369.

The spelling of 21749114 in words is "twenty-one million, seven hundred forty-nine thousand, one hundred fourteen".