21270932 has 6 divisors (see below), whose sum is σ = 37224138. Its totient is φ = 10635464.

The previous prime is 21270919. The next prime is 21270941. The reversal of 21270932 is 23907212.

It can be written as a sum of positive squares in only one way, i.e., 21215236 + 55696 = 4606^2 + 236^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2658863 + ... + 2658870.

It is an arithmetic number, because the mean of its divisors is an integer number (6204023).

Almost surely, 2^21270932 is an apocalyptic number.

It is an amenable number.

21270932 is a deficient number, since it is larger than the sum of its proper divisors (15953206).

21270932 is a wasteful number, since it uses less digits than its factorization.

21270932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5317737 (or 5317735 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 21270932 is about 4612.0420639886. The cubic root of 21270932 is about 277.0738289741.

The spelling of 21270932 in words is "twenty-one million, two hundred seventy thousand, nine hundred thirty-two".