20765467547 has 16 divisors (see below), whose sum is σ = 23997386592. Its totient is φ = 17758648320.

The previous prime is 20765467537. The next prime is 20765467609. The reversal of 20765467547 is 74576456702.

It is a cyclic number.

It is not a de Polignac number, because 20765467547 - 2⁴ = 20765467531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20765467537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376823 + ... + 428399.

It is an arithmetic number, because the mean of its divisors is an integer number (1499836662).

Almost surely, 2^20765467547 is an apocalyptic number.

20765467547 is a deficient number, since it is larger than the sum of its proper divisors (3231919045).

20765467547 is a wasteful number, since it uses less digits than its factorization.

20765467547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53758.

The product of its (nonzero) digits is 9878400, while the sum is 53.

The spelling of 20765467547 in words is "twenty billion, seven hundred sixty-five million, four hundred sixty-seven thousand, five hundred forty-seven".