21262316 has 12 divisors (see below), whose sum is σ = 37764888. Its totient is φ = 10472352.

The previous prime is 21262301. The next prime is 21262321. The reversal of 21262316 is 61326212.

It is a junction number, because it is equal to n+sod(n) for n = 21262291 and 21262300.

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, 39401 + ... + 39936.

It is an arithmetic number, because the mean of its divisors is an integer number (3147074).

Almost surely, 2^21262316 is an apocalyptic number.

It is an amenable number.

21262316 is a deficient number, since it is larger than the sum of its proper divisors (16502572).

21262316 is a wasteful number, since it uses less digits than its factorization.

21262316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79408 (or 79406 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 21262316 is about 4611.1078929038. The cubic root of 21262316 is about 277.0364134295.

Adding to 21262316 its reverse (61326212), we get a palindrome (82588528).

The spelling of 21262316 in words is "twenty-one million, two hundred sixty-two thousand, three hundred sixteen".