19250404081 has 4 divisors (see below), whose sum is σ = 19437301312. Its totient is φ = 19063506852.

The previous prime is 19250404051. The next prime is 19250404109. The reversal of 19250404081 is 18040405291.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 19250404081 - 2⁵ = 19250404049 is a prime.

It is a super-2 number, since 2×19250404081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19250404031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93448461 + ... + 93448666.

It is an arithmetic number, because the mean of its divisors is an integer number (4859325328).

Almost surely, 2^19250404081 is an apocalyptic number.

It is an amenable number.

19250404081 is a deficient number, since it is larger than the sum of its proper divisors (186897231).

19250404081 is a wasteful number, since it uses less digits than its factorization.

19250404081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186897230.

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 19250404081 in words is "nineteen billion, two hundred fifty million, four hundred four thousand, eighty-one".