21269298 has 8 divisors (see below), whose sum is σ = 42538608. Its totient is φ = 7089764.

The previous prime is 21269293. The next prime is 21269299. The reversal of 21269298 is 89296212.

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

21269298 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21269293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1772436 + ... + 1772447.

It is an arithmetic number, because the mean of its divisors is an integer number (5317326).

Almost surely, 2^21269298 is an apocalyptic number.

21269298 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21269298 is a wasteful number, since it uses less digits than its factorization.

21269298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3544888.

The product of its digits is 31104, while the sum is 39.

The square root of 21269298 is about 4611.8649156280. The cubic root of 21269298 is about 277.0667339985.

The spelling of 21269298 in words is "twenty-one million, two hundred sixty-nine thousand, two hundred ninety-eight".