21132414 has 20 divisors (see below), whose sum is σ = 47352624. Its totient is φ = 7044084.

The previous prime is 21132383. The next prime is 21132481. The reversal of 21132414 is 41423112.

21132414 = 2297² + 2298² + ... + 2300².

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 65062 + ... + 65385.

Almost surely, 2^21132414 is an apocalyptic number.

21132414 is an abundant number, since it is smaller than the sum of its proper divisors (26220210).

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

21132414 is a wasteful number, since it uses less digits than its factorization.

21132414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130461 (or 130452 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 21132414 is about 4597.0005438329. Note that the first 3 decimals coincide. The cubic root of 21132414 is about 276.4710764174.

Adding to 21132414 its reverse (41423112), we get a palindrome (62555526).

The spelling of 21132414 in words is "twenty-one million, one hundred thirty-two thousand, four hundred fourteen".