19287008240639 has 8 divisors (see below), whose sum is σ = 19356242653440. Its totient is φ = 19217815453656.

The previous prime is 19287008240567. The next prime is 19287008240641. The reversal of 19287008240639 is 93604280078291.

It is a happy number.

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 19287008240639 - 2¹² = 19287008236543 is a prime.

It is a super-2 number, since 2×19287008240639² (a number of 27 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 (19287008240659) 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, 9477959 + ... + 11331624.

It is an arithmetic number, because the mean of its divisors is an integer number (2419530331680).

Almost surely, 2^{19287008240639} is an apocalyptic number.

19287008240639 is a deficient number, since it is larger than the sum of its proper divisors (69234412801).

19287008240639 is a wasteful number, since it uses less digits than its factorization.

19287008240639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20812909.

The product of its (nonzero) digits is 10450944, while the sum is 59.

The spelling of 19287008240639 in words is "nineteen trillion, two hundred eighty-seven billion, eight million, two hundred forty thousand, six hundred thirty-nine".