19890001010111 has 16 divisors (see below), whose sum is σ = 20055568463328. Its totient is φ = 19724937523200.

The previous prime is 19890001010101. The next prime is 19890001010147. The reversal of 19890001010111 is 11101010009891.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19890001010111 is a prime.

It is a super-2 number, since 2×19890001010111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19890001010101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 668309471 + ... + 668339231.

It is an arithmetic number, because the mean of its divisors is an integer number (1253473028958).

Almost surely, 2^{19890001010111} is an apocalyptic number.

19890001010111 is a deficient number, since it is larger than the sum of its proper divisors (165567453217).

19890001010111 is a wasteful number, since it uses less digits than its factorization.

19890001010111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38042.

The product of its (nonzero) digits is 648, while the sum is 32.

The spelling of 19890001010111 in words is "nineteen trillion, eight hundred ninety billion, one million, ten thousand, one hundred eleven".