18812205390 has 32 divisors (see below), whose sum is σ = 49253774976. Its totient is φ = 4560534560.

The previous prime is 18812205353. The next prime is 18812205403. The reversal of 18812205390 is 9350221881.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28503012 + ... + 28503671.

It is an arithmetic number, because the mean of its divisors is an integer number (1539180468).

Almost surely, 2^18812205390 is an apocalyptic number.

18812205390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18812205390 is an abundant number, since it is smaller than the sum of its proper divisors (30441569586).

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

18812205390 is a wasteful number, since it uses less digits than its factorization.

18812205390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57006704.

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 18812205390 in words is "eighteen billion, eight hundred twelve million, two hundred five thousand, three hundred ninety".