21313058 has 24 divisors (see below), whose sum is σ = 35616924. Its totient is φ = 9508320.

The previous prime is 21313037. The next prime is 21313063. The reversal of 21313058 is 85031312.

It can be written as a sum of positive squares in 2 ways, for example, as 16999129 + 4313929 = 4123^2 + 2077^2 .

It is a super-3 number, since 3×21313058³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24560 + ... + 25412.

Almost surely, 2^21313058 is an apocalyptic number.

21313058 is a deficient number, since it is larger than the sum of its proper divisors (14303866).

21313058 is a wasteful number, since it uses less digits than its factorization.

21313058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930 (or 899 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 21313058 is about 4616.6067625476. The cubic root of 21313058 is about 277.2566185718.

The spelling of 21313058 in words is "twenty-one million, three hundred thirteen thousand, fifty-eight".