18821880345111 has 16 divisors (see below), whose sum is σ = 25125802859520. Its totient is φ = 12532947955200.

The previous prime is 18821880345101. The next prime is 18821880345133. The reversal of 18821880345111 is 11154308812881.

It is not a de Polignac number, because 18821880345111 - 2¹⁹ = 18821879820823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18821880345101) 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, 7334556 + ... + 9562398.

It is an arithmetic number, because the mean of its divisors is an integer number (1570362678720).

Almost surely, 2^{18821880345111} is an apocalyptic number.

18821880345111 is a deficient number, since it is larger than the sum of its proper divisors (6303922514409).

18821880345111 is a wasteful number, since it uses less digits than its factorization.

18821880345111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231206.

The product of its (nonzero) digits is 491520, while the sum is 51.

The spelling of 18821880345111 in words is "eighteen trillion, eight hundred twenty-one billion, eight hundred eighty million, three hundred forty-five thousand, one hundred eleven".