21074419 has 2 divisors, whose sum is σ = 21074420. Its totient is φ = 21074418.

The previous prime is 21074393. The next prime is 21074489. The reversal of 21074419 is 91447012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21074419 is a prime.

It is a super-2 number, since 2×21074419² = 888262272375122, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1334395 and since 21074419 and 1334395 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (21074489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10537209 + 10537210.

It is an arithmetic number, because the mean of its divisors is an integer number (10537210).

Almost surely, 2^21074419 is an apocalyptic number.

21074419 is a deficient number, since it is larger than the sum of its proper divisors (1).

21074419 is an equidigital number, since it uses as much as digits as its factorization.

21074419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 21074419 is about 4590.6882926202. The cubic root of 21074419 is about 276.2179324379.

The spelling of 21074419 in words is "twenty-one million, seventy-four thousand, four hundred nineteen".