21764114 has 8 divisors (see below), whose sum is σ = 34566588. Its totient is φ = 10241920.

The previous prime is 21764111. The next prime is 21764137. The reversal of 21764114 is 41146712.

It can be written as a sum of positive squares in 2 ways, for example, as 16265089 + 5499025 = 4033^2 + 2345^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21764111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320027 + ... + 320094.

Almost surely, 2^21764114 is an apocalyptic number.

21764114 is a deficient number, since it is larger than the sum of its proper divisors (12802474).

21764114 is a wasteful number, since it uses less digits than its factorization.

21764114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640140.

The product of its digits is 1344, while the sum is 26.

The square root of 21764114 is about 4665.2024607727. The cubic root of 21764114 is about 279.1988750047.

It can be divided in two parts, 2176 and 4114, that multiplied together give a square (8952064 = 2992²).

The spelling of 21764114 in words is "twenty-one million, seven hundred sixty-four thousand, one hundred fourteen".