21313034 has 16 divisors (see below), whose sum is σ = 32846856. Its totient is φ = 10368000.

The previous prime is 21313021. The next prime is 21313037. The reversal of 21313034 is 43031312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7645225 + 13667809 = 2765^2 + 3697^2 .

It is not an unprimeable number, because it can be changed into a prime (21313037) 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, 10934 + ... + 12734.

Almost surely, 2^21313034 is an apocalyptic number.

21313034 is a deficient number, since it is larger than the sum of its proper divisors (11533822).

21313034 is a wasteful number, since it uses less digits than its factorization.

21313034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 21313034 is about 4616.6041632351. The cubic root of 21313034 is about 277.2565145016.

Adding to 21313034 its reverse (43031312), we get a palindrome (64344346).

The spelling of 21313034 in words is "twenty-one million, three hundred thirteen thousand, thirty-four".