20146671547 has 2 divisors, whose sum is σ = 20146671548. Its totient is φ = 20146671546.

The previous prime is 20146671529. The next prime is 20146671557. The reversal of 20146671547 is 74517664102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20146671547 is a prime.

It is not a weakly prime, because it can be changed into another prime (20146671557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10073335773 + 10073335774.

It is an arithmetic number, because the mean of its divisors is an integer number (10073335774).

Almost surely, 2^20146671547 is an apocalyptic number.

20146671547 is a deficient number, since it is larger than the sum of its proper divisors (1).

20146671547 is an equidigital number, since it uses as much as digits as its factorization.

20146671547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 20146671547 in words is "twenty billion, one hundred forty-six million, six hundred seventy-one thousand, five hundred forty-seven".