21470710 has 8 divisors (see below), whose sum is σ = 38647296. Its totient is φ = 8588280.

The previous prime is 21470653. The next prime is 21470723. The reversal of 21470710 is 1707412.

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

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, 1073526 + ... + 1073545.

It is an arithmetic number, because the mean of its divisors is an integer number (4830912).

Almost surely, 2^21470710 is an apocalyptic number.

21470710 is a deficient number, since it is larger than the sum of its proper divisors (17176586).

21470710 is a wasteful number, since it uses less digits than its factorization.

21470710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147078.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 21470710 is about 4633.6497493876. The cubic root of 21470710 is about 277.9385593047.

The spelling of 21470710 in words is "twenty-one million, four hundred seventy thousand, seven hundred ten".