21269532 has 12 divisors (see below), whose sum is σ = 49628936. Its totient is φ = 7089840.

The previous prime is 21269527. The next prime is 21269537. The reversal of 21269532 is 23596212.

It is an interprime number because it is at equal distance from previous prime (21269527) and next prime (21269537).

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 21269532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21269537) 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, 886219 + ... + 886242.

Almost surely, 2^21269532 is an apocalyptic number.

It is an amenable number.

21269532 is an abundant number, since it is smaller than the sum of its proper divisors (28359404).

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

21269532 is a wasteful number, since it uses less digits than its factorization.

21269532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772468 (or 1772466 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 21269532 is about 4611.8902849049. The cubic root of 21269532 is about 277.0677500699.

The spelling of 21269532 in words is "twenty-one million, two hundred sixty-nine thousand, five hundred thirty-two".