21740171870716 has 12 divisors (see below), whose sum is σ = 40971862371832. Its totient is φ = 10033925478768.

The previous prime is 21740171870713. The next prime is 21740171870731. The reversal of 21740171870716 is 61707817104712.

It is a happy number.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (52), and also a Moran number because the ratio is a prime number: 418080228283 = 21740171870716 / (2 + 1 + 7 + 4 + 0 + 1 + 7 + 1 + 8 + 7 + 0 + 7 + 1 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21740171870713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209040114090 + ... + 209040114193.

Almost surely, 2^{21740171870716} is an apocalyptic number.

21740171870716 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21740171870716 is a deficient number, since it is larger than the sum of its proper divisors (19231690501116).

21740171870716 is a wasteful number, since it uses less digits than its factorization.

21740171870716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418080228300 (or 418080228298 counting only the distinct ones).

The product of its (nonzero) digits is 921984, while the sum is 52.

The spelling of 21740171870716 in words is "twenty-one trillion, seven hundred forty billion, one hundred seventy-one million, eight hundred seventy thousand, seven hundred sixteen".