21282934 has 8 divisors (see below), whose sum is σ = 32034240. Its totient is φ = 10604856.

The previous prime is 21282923. The next prime is 21282953. The reversal of 21282934 is 43928212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21282896 and 21282905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17574 + ... + 18745.

It is an arithmetic number, because the mean of its divisors is an integer number (4004280).

Almost surely, 2^21282934 is an apocalyptic number.

21282934 is a deficient number, since it is larger than the sum of its proper divisors (10751306).

21282934 is a wasteful number, since it uses less digits than its factorization.

21282934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36614.

The product of its digits is 6912, while the sum is 31.

The square root of 21282934 is about 4613.3430394888. The cubic root of 21282934 is about 277.1259316094.

The spelling of 21282934 in words is "twenty-one million, two hundred eighty-two thousand, nine hundred thirty-four".