20419191 has 24 divisors (see below), whose sum is σ = 31959200. Its totient is φ = 12488256.

The previous prime is 20419183. The next prime is 20419229. The reversal of 20419191 is 19191402.

It is not a de Polignac number, because 20419191 - 2³ = 20419183 is a prime.

It is a super-2 number, since 2×20419191² = 833886722188962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20419141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22845 + ... + 23721.

Almost surely, 2^20419191 is an apocalyptic number.

20419191 is a deficient number, since it is larger than the sum of its proper divisors (11540009).

20419191 is a wasteful number, since it uses less digits than its factorization.

20419191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095 (or 1092 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 20419191 is about 4518.7598962547. The cubic root of 20419191 is about 273.3250967509.

The spelling of 20419191 in words is "twenty million, four hundred nineteen thousand, one hundred ninety-one".