21769345099 has 8 divisors (see below), whose sum is σ = 21851780688. Its totient is φ = 21686945280.

The previous prime is 21769345021. The next prime is 21769345211. The reversal of 21769345099 is 99054396712.

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 21769345099 - 2²³ = 21760956491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21769342099) 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, 2450664 + ... + 2459530.

It is an arithmetic number, because the mean of its divisors is an integer number (2731472586).

Almost surely, 2^21769345099 is an apocalyptic number.

21769345099 is a deficient number, since it is larger than the sum of its proper divisors (82435589).

21769345099 is an equidigital number, since it uses as much as digits as its factorization.

21769345099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17885.

The product of its (nonzero) digits is 3674160, while the sum is 55.

The spelling of 21769345099 in words is "twenty-one billion, seven hundred sixty-nine million, three hundred forty-five thousand, ninety-nine".