20730163340 has 24 divisors (see below), whose sum is σ = 44595133632. Its totient is φ = 8089819520.

The previous prime is 20730163291. The next prime is 20730163343. The reversal of 20730163340 is 4336103702.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20730163343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12639524 + ... + 12641163.

It is an arithmetic number, because the mean of its divisors is an integer number (1858130568).

Almost surely, 2^20730163340 is an apocalyptic number.

20730163340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20730163340 is an abundant number, since it is smaller than the sum of its proper divisors (23864970292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20730163340 is a wasteful number, since it uses less digits than its factorization.

20730163340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25280737 (or 25280735 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 29.

The spelling of 20730163340 in words is "twenty billion, seven hundred thirty million, one hundred sixty-three thousand, three hundred forty".