18278738830 has 16 divisors (see below), whose sum is σ = 35892796464. Its totient is φ = 6646814080.

The previous prime is 18278738783. The next prime is 18278738843. The reversal of 18278738830 is 3883787281.

It is a super-2 number, since 2×18278738830² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 83085067 + ... + 83085286.

It is an arithmetic number, because the mean of its divisors is an integer number (2243299779).

Almost surely, 2^18278738830 is an apocalyptic number.

18278738830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18278738830 is a deficient number, since it is larger than the sum of its proper divisors (17614057634).

18278738830 is a wasteful number, since it uses less digits than its factorization.

18278738830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166170371.

The product of its (nonzero) digits is 3612672, while the sum is 55.

The spelling of 18278738830 in words is "eighteen billion, two hundred seventy-eight million, seven hundred thirty-eight thousand, eight hundred thirty".