20743647219 has 12 divisors (see below), whose sum is σ = 30470895000. Its totient is φ = 13594706304.

The previous prime is 20743647193. The next prime is 20743647277. The reversal of 20743647219 is 91274634702.

20743647219 is a `hidden beast` number, since 2 + 0 + 74 + 364 + 7 + 219 = 666.

It is not a de Polignac number, because 20743647219 - 2¹⁷ = 20743516147 is a prime.

It is a super-2 number, since 2×20743647219² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20743647289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19532094 + ... + 19533155.

It is an arithmetic number, because the mean of its divisors is an integer number (2539241250).

Almost surely, 2^20743647219 is an apocalyptic number.

20743647219 is a deficient number, since it is larger than the sum of its proper divisors (9727247781).

20743647219 is a wasteful number, since it uses less digits than its factorization.

20743647219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39065314 (or 39065311 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 20743647219 in words is "twenty billion, seven hundred forty-three million, six hundred forty-seven thousand, two hundred nineteen".