21269833 has 12 divisors (see below), whose sum is σ = 23236608. Its totient is φ = 19459440.

The previous prime is 21269827. The next prime is 21269837. The reversal of 21269833 is 33896212.

It is a happy number.

It is not a de Polignac number, because 21269833 - 2⁹ = 21269321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21269837) 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, 20968 + ... + 21958.

It is an arithmetic number, because the mean of its divisors is an integer number (1936384).

Almost surely, 2^21269833 is an apocalyptic number.

It is an amenable number.

21269833 is a deficient number, since it is larger than the sum of its proper divisors (1966775).

21269833 is a wasteful number, since it uses less digits than its factorization.

21269833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144 (or 1131 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 21269833 is about 4611.9229178294. The cubic root of 21269833 is about 277.0690570568.

The spelling of 21269833 in words is "twenty-one million, two hundred sixty-nine thousand, eight hundred thirty-three".