20446350919 has 4 divisors (see below), whose sum is σ = 20921847496. Its totient is φ = 19970854344.

The previous prime is 20446350893. The next prime is 20446350929. The reversal of 20446350919 is 91905364402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20446350919 is a prime.

It is a super-2 number, since 2×20446350919² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 475496533 = 20446350919 / (2 + 0 + 4 + 4 + 6 + 3 + 5 + 0 + 9 + 1 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20446350929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237748224 + ... + 237748309.

It is an arithmetic number, because the mean of its divisors is an integer number (5230461874).

Almost surely, 2^20446350919 is an apocalyptic number.

20446350919 is a deficient number, since it is larger than the sum of its proper divisors (475496577).

20446350919 is an equidigital number, since it uses as much as digits as its factorization.

20446350919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475496576.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 20446350919 in words is "twenty billion, four hundred forty-six million, three hundred fifty thousand, nine hundred nineteen".