21765016766214 has 80 divisors (see below), whose sum is σ = 48820500313200. Its totient is φ = 7247461360896.

The previous prime is 21765016766203. The next prime is 21765016766231. The reversal of 21765016766214 is 41266761056712.

21765016766214 is a `hidden beast` number, since 2 + 1 + 7 + 6 + 5 + 0 + 1 + 6 + 7 + 6 + 621 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 672220794 + ... + 672253170.

It is an arithmetic number, because the mean of its divisors is an integer number (610256253915).

Almost surely, 2^{21765016766214} is an apocalyptic number.

21765016766214 is an abundant number, since it is smaller than the sum of its proper divisors (27055483546986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21765016766214 is a wasteful number, since it uses less digits than its factorization.

21765016766214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36579 (or 36570 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 21765016766214 in words is "twenty-one trillion, seven hundred sixty-five billion, sixteen million, seven hundred sixty-six thousand, two hundred fourteen".