19417902449 has 16 divisors (see below), whose sum is σ = 21322077504. Its totient is φ = 17537083200.

The previous prime is 19417902437. The next prime is 19417902463. The reversal of 19417902449 is 94420971491.

It is a cyclic number.

It is not a de Polignac number, because 19417902449 - 2⁸ = 19417902193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19417902397 and 19417902406.

It is not an unprimeable number, because it can be changed into a prime (19417902479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2171702 + ... + 2180624.

It is an arithmetic number, because the mean of its divisors is an integer number (1332629844).

Almost surely, 2^19417902449 is an apocalyptic number.

It is an amenable number.

19417902449 is a deficient number, since it is larger than the sum of its proper divisors (1904175055).

19417902449 is a wasteful number, since it uses less digits than its factorization.

19417902449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10208.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 19417902449 in words is "nineteen billion, four hundred seventeen million, nine hundred two thousand, four hundred forty-nine".