20306545497 has 24 divisors (see below), whose sum is σ = 33542198976. Its totient is φ = 11596719456.

The previous prime is 20306545487. The next prime is 20306545513. The reversal of 20306545497 is 79454560302.

20306545497 is a `hidden beast` number, since 20 + 30 + 6 + 54 + 549 + 7 = 666.

It is not a de Polignac number, because 20306545497 - 2¹⁰ = 20306544473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20306545487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8343 + ... + 201699.

It is an arithmetic number, because the mean of its divisors is an integer number (1397591624).

Almost surely, 2^20306545497 is an apocalyptic number.

It is an amenable number.

20306545497 is a deficient number, since it is larger than the sum of its proper divisors (13235653479).

20306545497 is a wasteful number, since it uses less digits than its factorization.

20306545497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195037 (or 195034 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 20306545497 in words is "twenty billion, three hundred six million, five hundred forty-five thousand, four hundred ninety-seven".