21017711710 has 16 divisors (see below), whose sum is σ = 37833968592. Its totient is φ = 8406620800.

The previous prime is 21017711683. The next prime is 21017711713. The reversal of 21017711710 is 1711771012.

It is a super-2 number, since 2×21017711710² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21017711713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178065 + ... + 271555.

It is an arithmetic number, because the mean of its divisors is an integer number (2364623037).

Almost surely, 2^21017711710 is an apocalyptic number.

21017711710 is a deficient number, since it is larger than the sum of its proper divisors (16816256882).

21017711710 is a wasteful number, since it uses less digits than its factorization.

21017711710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115979.

The product of its (nonzero) digits is 686, while the sum is 28.

The spelling of 21017711710 in words is "twenty-one billion, seventeen million, seven hundred eleven thousand, seven hundred ten".