21711370 has 32 divisors (see below), whose sum is σ = 40030848. Its totient is φ = 8476608.

The previous prime is 21711331. The next prime is 21711419. The reversal of 21711370 is 7311712.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110112 + ... + 110308.

It is an arithmetic number, because the mean of its divisors is an integer number (1250964).

Almost surely, 2^21711370 is an apocalyptic number.

21711370 is a deficient number, since it is larger than the sum of its proper divisors (18319478).

21711370 is a wasteful number, since it uses less digits than its factorization.

21711370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 21711370 is about 4659.5461152348. The cubic root of 21711370 is about 278.9731520951.

The spelling of 21711370 in words is "twenty-one million, seven hundred eleven thousand, three hundred seventy".