20472063539 has 4 divisors (see below), whose sum is σ = 20807671200. Its totient is φ = 20136455880.

The previous prime is 20472063511. The next prime is 20472063553. The reversal of 20472063539 is 93536027402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20472063539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20472063496 and 20472063505.

It is not an unprimeable number, because it can be changed into a prime (20472063739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167803739 + ... + 167803860.

It is an arithmetic number, because the mean of its divisors is an integer number (5201917800).

Almost surely, 2^20472063539 is an apocalyptic number.

20472063539 is a deficient number, since it is larger than the sum of its proper divisors (335607661).

20472063539 is an equidigital number, since it uses as much as digits as its factorization.

20472063539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335607660.

The product of its (nonzero) digits is 272160, while the sum is 41.

The spelling of 20472063539 in words is "twenty billion, four hundred seventy-two million, sixty-three thousand, five hundred thirty-nine".