19807339469 has 4 divisors (see below), whose sum is σ = 20849831040. Its totient is φ = 18764847900.

The previous prime is 19807339457. The next prime is 19807339471. The reversal of 19807339469 is 96493370891.

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 19807339469 - 2¹⁶ = 19807273933 is a prime.

It is a super-2 number, since 2×19807339469² (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 (19807339429) 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, 521245757 + ... + 521245794.

It is an arithmetic number, because the mean of its divisors is an integer number (5212457760).

Almost surely, 2^19807339469 is an apocalyptic number.

19807339469 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

19807339469 is a deficient number, since it is larger than the sum of its proper divisors (1042491571).

19807339469 is a wasteful number, since it uses less digits than its factorization.

19807339469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042491570.

The product of its (nonzero) digits is 8817984, while the sum is 59.

The spelling of 19807339469 in words is "nineteen billion, eight hundred seven million, three hundred thirty-nine thousand, four hundred sixty-nine".