18861880149223 has 16 divisors (see below), whose sum is σ = 20129665263840. Its totient is φ = 17611758028800.

The previous prime is 18861880149187. The next prime is 18861880149241. The reversal of 18861880149223 is 32294108816881.

It is a happy number.

It is not a de Polignac number, because 18861880149223 - 2¹³ = 18861880141031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18861880149023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6504703 + ... + 8946223.

It is an arithmetic number, because the mean of its divisors is an integer number (1258104078990).

Almost surely, 2^{18861880149223} is an apocalyptic number.

18861880149223 is a deficient number, since it is larger than the sum of its proper divisors (1267785114617).

18861880149223 is a wasteful number, since it uses less digits than its factorization.

18861880149223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445138.

The product of its (nonzero) digits is 10616832, while the sum is 61.

The spelling of 18861880149223 in words is "eighteen trillion, eight hundred sixty-one billion, eight hundred eighty million, one hundred forty-nine thousand, two hundred twenty-three".