20473730667 has 40 divisors (see below), whose sum is σ = 32957176560. Its totient is φ = 12591443520.

The previous prime is 20473730659. The next prime is 20473730671. The reversal of 20473730667 is 76603737402.

It is not a de Polignac number, because 20473730667 - 2³ = 20473730659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20473734667) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2028309 + ... + 2038377.

It is an arithmetic number, because the mean of its divisors is an integer number (823929414).

Almost surely, 2^20473730667 is an apocalyptic number.

20473730667 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20473730667 is a deficient number, since it is larger than the sum of its proper divisors (12483445893).

20473730667 is a wasteful number, since it uses less digits than its factorization.

20473730667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12025 (or 12016 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 45.

The spelling of 20473730667 in words is "twenty billion, four hundred seventy-three million, seven hundred thirty thousand, six hundred sixty-seven".