21330419 has 16 divisors (see below), whose sum is σ = 23998464. Its totient is φ = 18794400.

The previous prime is 21330403. The next prime is 21330443. The reversal of 21330419 is 91403312.

It is a cyclic number.

It is not a de Polignac number, because 21330419 - 2⁴ = 21330403 is a prime.

It is a super-2 number, since 2×21330419² = 909973549431122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21330394 and 21330403.

It is not an unprimeable number, because it can be changed into a prime (21330469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55502 + ... + 55884.

It is an arithmetic number, because the mean of its divisors is an integer number (1499904).

Almost surely, 2^21330419 is an apocalyptic number.

21330419 is a deficient number, since it is larger than the sum of its proper divisors (2668045).

21330419 is a wasteful number, since it uses less digits than its factorization.

21330419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 21330419 is about 4618.4866569040. The cubic root of 21330419 is about 277.3318798784.

The spelling of 21330419 in words is "twenty-one million, three hundred thirty thousand, four hundred nineteen".