21414777 has 8 divisors (see below), whose sum is σ = 28728864. Its totient is φ = 14188608.

The previous prime is 21414763. The next prime is 21414779. The reversal of 21414777 is 77741412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21414777 - 2⁴ = 21414761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21414779) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 21408 + ... + 22385.

It is an arithmetic number, because the mean of its divisors is an integer number (3591108).

Almost surely, 2^21414777 is an apocalyptic number.

It is an amenable number.

21414777 is a deficient number, since it is larger than the sum of its proper divisors (7314087).

21414777 is a wasteful number, since it uses less digits than its factorization.

21414777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43959.

The product of its digits is 10976, while the sum is 33.

The square root of 21414777 is about 4627.6102904199. The cubic root of 21414777 is about 277.6969983363.

The spelling of 21414777 in words is "twenty-one million, four hundred fourteen thousand, seven hundred seventy-seven".