20534328547 has 2 divisors, whose sum is σ = 20534328548. Its totient is φ = 20534328546.

The previous prime is 20534328523. The next prime is 20534328643. The reversal of 20534328547 is 74582343502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20534328547 - 2²³ = 20525939939 is a prime.

It is a super-2 number, since 2×20534328547² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20534328047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10267164273 + 10267164274.

It is an arithmetic number, because the mean of its divisors is an integer number (10267164274).

Almost surely, 2^20534328547 is an apocalyptic number.

20534328547 is a deficient number, since it is larger than the sum of its proper divisors (1).

20534328547 is an equidigital number, since it uses as much as digits as its factorization.

20534328547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806400, while the sum is 43.

The spelling of 20534328547 in words is "twenty billion, five hundred thirty-four million, three hundred twenty-eight thousand, five hundred forty-seven".