20181807460 has 48 divisors (see below), whose sum is σ = 43204202496. Its totient is φ = 7916235392.

The previous prime is 20181807449. The next prime is 20181807463. The reversal of 20181807460 is 6470818102.

It is not an unprimeable number, because it can be changed into a prime (20181807463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2691837 + ... + 2699323.

It is an arithmetic number, because the mean of its divisors is an integer number (900087552).

Almost surely, 2^20181807460 is an apocalyptic number.

20181807460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20181807460 is an abundant number, since it is smaller than the sum of its proper divisors (23022395036).

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

20181807460 is a wasteful number, since it uses less digits than its factorization.

20181807460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10092 (or 10090 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The spelling of 20181807460 in words is "twenty billion, one hundred eighty-one million, eight hundred seven thousand, four hundred sixty".