21414354 has 32 divisors (see below), whose sum is σ = 47718720. Its totient is φ = 6361152.

The previous prime is 21414313. The next prime is 21414361. The reversal of 21414354 is 45341412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2472 + ... + 6995.

It is an arithmetic number, because the mean of its divisors is an integer number (1491210).

Almost surely, 2^21414354 is an apocalyptic number.

21414354 is an abundant number, since it is smaller than the sum of its proper divisors (26304366).

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

21414354 is a wasteful number, since it uses less digits than its factorization.

21414354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9514.

The product of its digits is 1920, while the sum is 24.

The square root of 21414354 is about 4627.5645862592. The cubic root of 21414354 is about 277.6951699010.

Adding to 21414354 its reverse (45341412), we get a palindrome (66755766).

The spelling of 21414354 in words is "twenty-one million, four hundred fourteen thousand, three hundred fifty-four".