21046495 has 16 divisors (see below), whose sum is σ = 26516160. Its totient is φ = 16006144.

The previous prime is 21046477. The next prime is 21046507. The reversal of 21046495 is 59464012.

It is a cyclic number.

It is not a de Polignac number, because 21046495 - 2⁵ = 21046463 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22191 + ... + 23119.

It is an arithmetic number, because the mean of its divisors is an integer number (1657260).

Almost surely, 2^21046495 is an apocalyptic number.

21046495 is a deficient number, since it is larger than the sum of its proper divisors (5469665).

21046495 is a wasteful number, since it uses less digits than its factorization.

21046495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 21046495 is about 4587.6459104861. The cubic root of 21046495 is about 276.0958805365.

The spelling of 21046495 in words is "twenty-one million, forty-six thousand, four hundred ninety-five".