21269132 has 12 divisors (see below), whose sum is σ = 39180120. Its totient is φ = 10074816.

The previous prime is 21269123. The next prime is 21269137. The reversal of 21269132 is 23196212.

It is not an unprimeable number, because it can be changed into a prime (21269137) 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, 139853 + ... + 140004.

It is an arithmetic number, because the mean of its divisors is an integer number (3265010).

Almost surely, 2^21269132 is an apocalyptic number.

It is an amenable number.

21269132 is a deficient number, since it is larger than the sum of its proper divisors (17910988).

21269132 is a wasteful number, since it uses less digits than its factorization.

21269132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279880 (or 279878 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

The square root of 21269132 is about 4611.8469185349. The cubic root of 21269132 is about 277.0660131911.

The spelling of 21269132 in words is "twenty-one million, two hundred sixty-nine thousand, one hundred thirty-two".