21327436 has 12 divisors (see below), whose sum is σ = 40194112. Its totient is φ = 9843408.

The previous prime is 21327407. The next prime is 21327451. The reversal of 21327436 is 63472312.

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, 205020 + ... + 205123.

Almost surely, 2^21327436 is an apocalyptic number.

21327436 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21327436 is a deficient number, since it is larger than the sum of its proper divisors (18866676).

21327436 is a wasteful number, since it uses less digits than its factorization.

21327436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410160 (or 410158 counting only the distinct ones).

The product of its digits is 6048, while the sum is 28.

The square root of 21327436 is about 4618.1637043310. The cubic root of 21327436 is about 277.3189512440.

Adding to 21327436 its reverse (63472312), we get a palindrome (84799748).

The spelling of 21327436 in words is "twenty-one million, three hundred twenty-seven thousand, four hundred thirty-six".