21146323 has 6 divisors (see below), whose sum is σ = 23243612. Its totient is φ = 19223820.

The previous prime is 21146299. The next prime is 21146329. The reversal of 21146323 is 32364112.

It is not a de Polignac number, because 21146323 - 2⁹ = 21145811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21146294 and 21146303.

It is not an unprimeable number, because it can be changed into a prime (21146329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87261 + ... + 87502.

Almost surely, 2^21146323 is an apocalyptic number.

21146323 is a deficient number, since it is larger than the sum of its proper divisors (2097289).

21146323 is a wasteful number, since it uses less digits than its factorization.

21146323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174785 (or 174774 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 21146323 is about 4598.5131292625. The cubic root of 21146323 is about 276.5317193211.

The spelling of 21146323 in words is "twenty-one million, one hundred forty-six thousand, three hundred twenty-three".