19428111 has 6 divisors (see below), whose sum is σ = 28062840. Its totient is φ = 12952068.

The previous prime is 19428109. The next prime is 19428121. The reversal of 19428111 is 11182491.

It is not a de Polignac number, because 19428111 - 2¹ = 19428109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19428121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1079331 + ... + 1079348.

It is an arithmetic number, because the mean of its divisors is an integer number (4677140).

Almost surely, 2^19428111 is an apocalyptic number.

19428111 is a deficient number, since it is larger than the sum of its proper divisors (8634729).

19428111 is a wasteful number, since it uses less digits than its factorization.

19428111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158685 (or 2158682 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

The square root of 19428111 is about 4407.7330908303. The cubic root of 19428111 is about 268.8294593961.

The spelling of 19428111 in words is "nineteen million, four hundred twenty-eight thousand, one hundred eleven".