21514136 has 48 divisors (see below), whose sum is σ = 47647440. Its totient is φ = 9078720.

The previous prime is 21514123. The next prime is 21514153. The reversal of 21514136 is 63141512.

It is a congruent number.

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, 27446 + ... + 28218.

It is an arithmetic number, because the mean of its divisors is an integer number (992655).

Almost surely, 2^21514136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21514136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23823720).

21514136 is an abundant number, since it is smaller than the sum of its proper divisors (26133304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21514136 is a wasteful number, since it uses less digits than its factorization.

21514136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 853 counting only the distinct ones).

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

The square root of 21514136 is about 4638.3333213559. Note that the first 4 decimals coincide. The cubic root of 21514136 is about 278.1258164518.

Adding to 21514136 its reverse (63141512), we get a palindrome (84655648).

The spelling of 21514136 in words is "twenty-one million, five hundred fourteen thousand, one hundred thirty-six".