21710701670 has 32 divisors (see below), whose sum is σ = 44681193216. Its totient is φ = 7440472800.

The previous prime is 21710701619. The next prime is 21710701721. The reversal of 21710701670 is 7610701712.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21710701619) and next prime (21710701721).

It is a Curzon number.

It is a congruent number.

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, 100565 + ... + 231375.

It is an arithmetic number, because the mean of its divisors is an integer number (1396287288).

Almost surely, 2^21710701670 is an apocalyptic number.

21710701670 is an abundant number, since it is smaller than the sum of its proper divisors (22970491546).

21710701670 is a wasteful number, since it uses less digits than its factorization.

21710701670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133196.

The product of its (nonzero) digits is 4116, while the sum is 32.

The spelling of 21710701670 in words is "twenty-one billion, seven hundred ten million, seven hundred one thousand, six hundred seventy".