21514036 has 12 divisors (see below), whose sum is σ = 37787428. Its totient is φ = 10717632.

The previous prime is 21514033. The next prime is 21514037. The reversal of 21514036 is 63041512.

It can be written as a sum of positive squares in 2 ways, for example, as 1210000 + 20304036 = 1100^2 + 4506^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21513998 and 21514016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8601 + ... + 10816.

Almost surely, 2^21514036 is an apocalyptic number.

It is an amenable number.

21514036 is a deficient number, since it is larger than the sum of its proper divisors (16273392).

21514036 is a wasteful number, since it uses less digits than its factorization.

21514036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19698 (or 19696 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 21514036 is about 4638.3225416092. The cubic root of 21514036 is about 278.1253855316.

Adding to 21514036 its reverse (63041512), we get a palindrome (84555548).

The spelling of 21514036 in words is "twenty-one million, five hundred fourteen thousand, thirty-six".