21468232 has 8 divisors (see below), whose sum is σ = 40252950. Its totient is φ = 10734112.

The previous prime is 21468217. The next prime is 21468247. The reversal of 21468232 is 23286412.

It is an interprime number because it is at equal distance from previous prime (21468217) and next prime (21468247).

It can be written as a sum of positive squares in only one way, i.e., 20738916 + 729316 = 4554^2 + 854^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 21468232.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1341757 + ... + 1341772.

Almost surely, 2^21468232 is an apocalyptic number.

It is an amenable number.

21468232 is a deficient number, since it is larger than the sum of its proper divisors (18784718).

21468232 is a wasteful number, since it uses less digits than its factorization.

21468232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683535 (or 2683531 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 21468232 is about 4633.3823498606. The cubic root of 21468232 is about 277.9278663149.

The spelling of 21468232 in words is "twenty-one million, four hundred sixty-eight thousand, two hundred thirty-two".