20017481800 has 48 divisors (see below), whose sum is σ = 46559073600. Its totient is φ = 8003822400.

The previous prime is 20017481791. The next prime is 20017481849. The reversal of 20017481800 is 818471002.

It is a super-2 number, since 2×20017481800² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 523741 + ... + 560659.

It is an arithmetic number, because the mean of its divisors is an integer number (969980700).

Almost surely, 2^20017481800 is an apocalyptic number.

20017481800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20017481800 is an abundant number, since it is smaller than the sum of its proper divisors (26541591800).

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

20017481800 is a wasteful number, since it uses less digits than its factorization.

20017481800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39646 (or 39637 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The spelling of 20017481800 in words is "twenty billion, seventeen million, four hundred eighty-one thousand, eight hundred".