19426121 has 32 divisors (see below), whose sum is σ = 24748416. Its totient is φ = 14976000.

The previous prime is 19426111. The next prime is 19426133. The reversal of 19426121 is 12162491.

It is a de Polignac number, because none of the positive numbers 2^k-19426121 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19426111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148226 + ... + 148356.

It is an arithmetic number, because the mean of its divisors is an integer number (773388).

Almost surely, 2^19426121 is an apocalyptic number.

19426121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19426121 is a deficient number, since it is larger than the sum of its proper divisors (5322295).

19426121 is a wasteful number, since it uses less digits than its factorization.

19426121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233.

The product of its digits is 864, while the sum is 26.

The square root of 19426121 is about 4407.5073454278. The cubic root of 19426121 is about 268.8202804476.

The spelling of 19426121 in words is "nineteen million, four hundred twenty-six thousand, one hundred twenty-one".