21488714 has 32 divisors (see below), whose sum is σ = 37403856. Its totient is φ = 9169920.

The previous prime is 21488713. The next prime is 21488717. The reversal of 21488714 is 41788412.

It can be written as a sum of positive squares in 8 ways, for example, as 3705625 + 17783089 = 1925^2 + 4217^2 .

It is not an unprimeable number, because it can be changed into a prime (21488713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26564 + ... + 27360.

Almost surely, 2^21488714 is an apocalyptic number.

21488714 is a deficient number, since it is larger than the sum of its proper divisors (15915142).

21488714 is a wasteful number, since it uses less digits than its factorization.

21488714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890.

The product of its digits is 14336, while the sum is 35.

The square root of 21488714 is about 4635.5920873174. The cubic root of 21488714 is about 278.0162249213.

The spelling of 21488714 in words is "twenty-one million, four hundred eighty-eight thousand, seven hundred fourteen".