19470920249 has 16 divisors (see below), whose sum is σ = 21446498304. Its totient is φ = 17530141200.

The previous prime is 19470920243. The next prime is 19470920297. The reversal of 19470920249 is 94202907491.

It is a de Polignac number, because none of the positive numbers 2^k-19470920249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19470920243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 711392 + ... + 738254.

It is an arithmetic number, because the mean of its divisors is an integer number (1340406144).

Almost surely, 2^19470920249 is an apocalyptic number.

It is an amenable number.

19470920249 is a deficient number, since it is larger than the sum of its proper divisors (1975578055).

19470920249 is a wasteful number, since it uses less digits than its factorization.

19470920249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27508.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 19470920249 in words is "nineteen billion, four hundred seventy million, nine hundred twenty thousand, two hundred forty-nine".