21319234 has 8 divisors (see below), whose sum is σ = 33081660. Its totient is φ = 10292016.

The previous prime is 21319223. The next prime is 21319261. The reversal of 21319234 is 43291312.

It can be written as a sum of positive squares in 2 ways, for example, as 21114025 + 205209 = 4595^2 + 453^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21319199 and 21319208.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183729 + ... + 183844.

Almost surely, 2^21319234 is an apocalyptic number.

21319234 is a deficient number, since it is larger than the sum of its proper divisors (11762426).

21319234 is a wasteful number, since it uses less digits than its factorization.

21319234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367604.

The product of its digits is 1296, while the sum is 25.

The square root of 21319234 is about 4617.2756036433. The cubic root of 21319234 is about 277.2833967016.

It can be divided in two parts, 213192 and 34, that multiplied together give a triangular number (7248528 = T₃₈₀₇).

The spelling of 21319234 in words is "twenty-one million, three hundred nineteen thousand, two hundred thirty-four".