21414976 has 56 divisors (see below), whose sum is σ = 48828960. Its totient is φ = 9216000.

The previous prime is 21414973. The next prime is 21414983. The reversal of 21414976 is 67941412.

It is not an unprimeable number, because it can be changed into a prime (21414973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12576 + ... + 14176.

Almost surely, 2^21414976 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 21414976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24414480).

21414976 is an abundant number, since it is smaller than the sum of its proper divisors (27413984).

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

21414976 is a wasteful number, since it uses less digits than its factorization.

21414976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643 (or 1633 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 21414976 is about 4627.6317917483. The cubic root of 21414976 is about 277.6978585139.

It can be divided in two parts, 2141 and 4976, that added together give a palindrome (7117).

The spelling of 21414976 in words is "twenty-one million, four hundred fourteen thousand, nine hundred seventy-six".