21343419 has 12 divisors (see below), whose sum is σ = 31971576. Its totient is φ = 14228784.

The previous prime is 21343373. The next prime is 21343429. The reversal of 21343419 is 91434312.

21343419 is a `hidden beast` number, since 213 + 434 + 19 = 666.

It is not a de Polignac number, because 21343419 - 2⁸ = 21343163 is a prime.

It is a super-2 number, since 2×21343419² = 911083069219122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21343392 and 21343401.

It is not an unprimeable number, because it can be changed into a prime (21343429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43674 + ... + 44159.

It is an arithmetic number, because the mean of its divisors is an integer number (2664298).

Almost surely, 2^21343419 is an apocalyptic number.

21343419 is a deficient number, since it is larger than the sum of its proper divisors (10628157).

21343419 is an frugal number, since it uses more digits than its factorization.

21343419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87848 (or 87836 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 21343419 is about 4619.8938299489. The cubic root of 21343419 is about 277.3882091713.

The spelling of 21343419 in words is "twenty-one million, three hundred forty-three thousand, four hundred nineteen".