19892101 has 4 divisors (see below), whose sum is σ = 20354752. Its totient is φ = 19429452.

The previous prime is 19892083. The next prime is 19892113. The reversal of 19892101 is 10129891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10129891 = 89 ⋅113819.

It is a cyclic number.

It is not a de Polignac number, because 19892101 - 2⁷ = 19891973 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 (19892801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231261 + ... + 231346.

It is an arithmetic number, because the mean of its divisors is an integer number (5088688).

Almost surely, 2^19892101 is an apocalyptic number.

It is an amenable number.

19892101 is a deficient number, since it is larger than the sum of its proper divisors (462651).

19892101 is an equidigital number, since it uses as much as digits as its factorization.

19892101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462650.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 19892101 is about 4460.0561655656. The cubic root of 19892101 is about 270.9527429478.

The spelling of 19892101 in words is "nineteen million, eight hundred ninety-two thousand, one hundred one".