21740014 has 16 divisors (see below), whose sum is σ = 34165152. Its totient is φ = 10355488.

The previous prime is 21740011. The next prime is 21740023. The reversal of 21740014 is 41004712.

It is a junction number, because it is equal to n+sod(n) for n = 21739973 and 21740000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21740011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12672 + ... + 14284.

It is an arithmetic number, because the mean of its divisors is an integer number (2135322).

Almost surely, 2^21740014 is an apocalyptic number.

21740014 is a deficient number, since it is larger than the sum of its proper divisors (12425138).

21740014 is a wasteful number, since it uses less digits than its factorization.

21740014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 21740014 is about 4662.6187920524. The cubic root of 21740014 is about 279.0957820870.

Adding to 21740014 its reverse (41004712), we get a palindrome (62744726).

The spelling of 21740014 in words is "twenty-one million, seven hundred forty thousand, fourteen".