21295432 has 8 divisors (see below), whose sum is σ = 39928950. Its totient is φ = 10647712.

The previous prime is 21295411. The next prime is 21295459. The reversal of 21295432 is 23459212.

It can be written as a sum of positive squares in only one way, i.e., 20738916 + 556516 = 4554^2 + 746^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21295432.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330957 + ... + 1330972.

Almost surely, 2^21295432 is an apocalyptic number.

It is an amenable number.

21295432 is a deficient number, since it is larger than the sum of its proper divisors (18633518).

21295432 is a wasteful number, since it uses less digits than its factorization.

21295432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661935 (or 2661931 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 21295432 is about 4614.6973898621. The cubic root of 21295432 is about 277.1801666466.

The spelling of 21295432 in words is "twenty-one million, two hundred ninety-five thousand, four hundred thirty-two".