21514316 has 36 divisors (see below), whose sum is σ = 41157648. Its totient is φ = 9831168.

The previous prime is 21514301. The next prime is 21514369. The reversal of 21514316 is 61341512.

It is a junction number, because it is equal to n+sod(n) for n = 21514291 and 21514300.

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, 42521 + ... + 43023.

It is an arithmetic number, because the mean of its divisors is an integer number (1143268).

Almost surely, 2^21514316 is an apocalyptic number.

It is an amenable number.

21514316 is a deficient number, since it is larger than the sum of its proper divisors (19643332).

21514316 is a wasteful number, since it uses less digits than its factorization.

21514316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578 (or 559 counting only the distinct ones).

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

The square root of 21514316 is about 4638.3527248367. The cubic root of 21514316 is about 278.1265921047.

Adding to 21514316 its reverse (61341512), we get a palindrome (82855828).

The spelling of 21514316 in words is "twenty-one million, five hundred fourteen thousand, three hundred sixteen".