21766946750 has 16 divisors (see below), whose sum is σ = 40747724784. Its totient is φ = 8706778600.

The previous prime is 21766946737. The next prime is 21766946807. The reversal of 21766946750 is 5764966712.

It is a junction number, because it is equal to n+sod(n) for n = 21766946692 and 21766946701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43533644 + ... + 43534143.

It is an arithmetic number, because the mean of its divisors is an integer number (2546732799).

Almost surely, 2^21766946750 is an apocalyptic number.

21766946750 is a deficient number, since it is larger than the sum of its proper divisors (18980778034).

21766946750 is an equidigital number, since it uses as much as digits as its factorization.

21766946750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87067804 (or 87067794 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 21766946750 in words is "twenty-one billion, seven hundred sixty-six million, nine hundred forty-six thousand, seven hundred fifty".