18283810878 has 24 divisors (see below), whose sum is σ = 39647205000. Its totient is φ = 6089637264.

The previous prime is 18283810871. The next prime is 18283810997. The reversal of 18283810878 is 87801838281.

18283810878 is a `hidden beast` number, since 182 + 8 + 381 + 0 + 87 + 8 = 666.

It is a super-2 number, since 2×18283810878² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18283810871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 391128 + ... + 435371.

It is an arithmetic number, because the mean of its divisors is an integer number (1651966875).

Almost surely, 2^18283810878 is an apocalyptic number.

18283810878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18283810878 is an abundant number, since it is smaller than the sum of its proper divisors (21363394122).

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

18283810878 is a wasteful number, since it uses less digits than its factorization.

18283810878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827736 (or 827733 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 54.

The spelling of 18283810878 in words is "eighteen billion, two hundred eighty-three million, eight hundred ten thousand, eight hundred seventy-eight".