19240642757 has 8 divisors (see below), whose sum is σ = 22071052800. Its totient is φ = 16430669424.

The previous prime is 19240642723. The next prime is 19240642769. The reversal of 19240642757 is 75724604291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19240642757 - 2⁶ = 19240642693 is a prime.

It is a super-2 number, since 2×19240642757² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19240642457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5107157 + ... + 5110922.

It is an arithmetic number, because the mean of its divisors is an integer number (2758881600).

Almost surely, 2^19240642757 is an apocalyptic number.

It is an amenable number.

19240642757 is a deficient number, since it is larger than the sum of its proper divisors (2830410043).

19240642757 is a wasteful number, since it uses less digits than its factorization.

19240642757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10218355.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 19240642757 in words is "nineteen billion, two hundred forty million, six hundred forty-two thousand, seven hundred fifty-seven".