21426596 has 12 divisors (see below), whose sum is σ = 39702348. Its totient is φ = 10083072.

The previous prime is 21426583. The next prime is 21426607. The reversal of 21426596 is 69562412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13586596 + 7840000 = 3686^2 + 2800^2 .

It is a super-2 number, since 2×21426596² = 918198032294432, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157481 + ... + 157616.

It is an arithmetic number, because the mean of its divisors is an integer number (3308529).

Almost surely, 2^21426596 is an apocalyptic number.

It is an amenable number.

21426596 is a deficient number, since it is larger than the sum of its proper divisors (18275752).

21426596 is a wasteful number, since it uses less digits than its factorization.

21426596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315118 (or 315116 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 21426596 is about 4628.8871232727. The cubic root of 21426596 is about 277.7480767296.

It can be divided in two parts, 21426 and 596, that added together give a palindrome (22022).

The spelling of 21426596 in words is "twenty-one million, four hundred twenty-six thousand, five hundred ninety-six".