19400049 has 12 divisors (see below), whose sum is σ = 28619136. Its totient is φ = 12657912.

The previous prime is 19400039. The next prime is 19400057. The reversal of 19400049 is 94000491.

It is not a de Polignac number, because 19400049 - 2⁴ = 19400033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19399995 and 19400031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19400039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22509 + ... + 23354.

It is an arithmetic number, because the mean of its divisors is an integer number (2384928).

Almost surely, 2^19400049 is an apocalyptic number.

It is an amenable number.

19400049 is a deficient number, since it is larger than the sum of its proper divisors (9219087).

19400049 is a wasteful number, since it uses less digits than its factorization.

19400049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45916 (or 45913 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 19400049 is about 4404.5486715440. The cubic root of 19400049 is about 268.6999644366.

The spelling of 19400049 in words is "nineteen million, four hundred thousand, forty-nine".