18803539875 has 64 divisors (see below), whose sum is σ = 32076076032. Its totient is φ = 9777196800.

The previous prime is 18803539847. The next prime is 18803539879. The reversal of 18803539875 is 57893530881.

It is a happy number.

It is a Cunningham number, because it is equal to 137126²-1.

It is not a de Polignac number, because 18803539875 - 2⁷ = 18803539747 is a prime.

It is a super-2 number, since 2×18803539875² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18803539879) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17140327 + ... + 17141423.

It is an arithmetic number, because the mean of its divisors is an integer number (501188688).

Almost surely, 2^18803539875 is an apocalyptic number.

18803539875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18803539875 is a deficient number, since it is larger than the sum of its proper divisors (13272536157).

18803539875 is a wasteful number, since it uses less digits than its factorization.

18803539875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221 (or 2211 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 57.

The spelling of 18803539875 in words is "eighteen billion, eight hundred three million, five hundred thirty-nine thousand, eight hundred seventy-five".