21766040107 has 8 divisors (see below), whose sum is σ = 25482193632. Its totient is φ = 18201566400.

The previous prime is 21766040099. The next prime is 21766040113. The reversal of 21766040107 is 70104066712.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21766040107 - 2³ = 21766040099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21766040147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37919644 + ... + 37920217.

It is an arithmetic number, because the mean of its divisors is an integer number (3185274204).

Almost surely, 2^21766040107 is an apocalyptic number.

21766040107 is a deficient number, since it is larger than the sum of its proper divisors (3716153525).

21766040107 is an equidigital number, since it uses as much as digits as its factorization.

21766040107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75839909.

The product of its (nonzero) digits is 14112, while the sum is 34.

The spelling of 21766040107 in words is "twenty-one billion, seven hundred sixty-six million, forty thousand, one hundred seven".