20028384547 has 2 divisors, whose sum is σ = 20028384548. Its totient is φ = 20028384546.

The previous prime is 20028384451. The next prime is 20028384577. The reversal of 20028384547 is 74548382002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20028384547 - 2¹⁵ = 20028351779 is a prime.

It is a super-2 number, since 2×20028384547² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20028384577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10014192273 + 10014192274.

It is an arithmetic number, because the mean of its divisors is an integer number (10014192274).

Almost surely, 2^20028384547 is an apocalyptic number.

20028384547 is a deficient number, since it is larger than the sum of its proper divisors (1).

20028384547 is an equidigital number, since it uses as much as digits as its factorization.

20028384547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 430080, while the sum is 43.

The spelling of 20028384547 in words is "twenty billion, twenty-eight million, three hundred eighty-four thousand, five hundred forty-seven".