20472733047 has 16 divisors (see below), whose sum is σ = 29400497280. Its totient is φ = 12596996832.

The previous prime is 20472733003. The next prime is 20472733117. The reversal of 20472733047 is 74033727402.

It is not a de Polignac number, because 20472733047 - 2¹⁰ = 20472732023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 20472732996 and 20472733014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20472734047) 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 15 ways as a sum of consecutive naturals, for example, 324328 + ... + 382274.

It is an arithmetic number, because the mean of its divisors is an integer number (1837531080).

Almost surely, 2^20472733047 is an apocalyptic number.

20472733047 is a deficient number, since it is larger than the sum of its proper divisors (8927764233).

20472733047 is a wasteful number, since it uses less digits than its factorization.

20472733047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67022.

The product of its (nonzero) digits is 197568, while the sum is 39.

The spelling of 20472733047 in words is "twenty billion, four hundred seventy-two million, seven hundred thirty-three thousand, forty-seven".