21769714919 has 4 divisors (see below), whose sum is σ = 21795975960. Its totient is φ = 21743453880.

The previous prime is 21769714903. The next prime is 21769714927. The reversal of 21769714919 is 91941796712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21769714919 - 2⁴ = 21769714903 is a prime.

It is a super-2 number, since 2×21769714919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21769714999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13129277 + ... + 13130934.

It is an arithmetic number, because the mean of its divisors is an integer number (5448993990).

Almost surely, 2^21769714919 is an apocalyptic number.

21769714919 is a deficient number, since it is larger than the sum of its proper divisors (26261041).

21769714919 is an equidigital number, since it uses as much as digits as its factorization.

21769714919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26261040.

The product of its digits is 1714608, while the sum is 56.

The spelling of 21769714919 in words is "twenty-one billion, seven hundred sixty-nine million, seven hundred fourteen thousand, nine hundred nineteen".