19107949 has 16 divisors (see below), whose sum is σ = 23262336. Its totient is φ = 15321600.

The previous prime is 19107943. The next prime is 19108003. The reversal of 19107949 is 94970191.

It is a happy number.

It is not a de Polignac number, because 19107949 - 2³ = 19107941 is a prime.

It is a super-2 number, since 2×19107949² = 730227429973202, which 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 (19107941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24729 + ... + 25489.

It is an arithmetic number, because the mean of its divisors is an integer number (1453896).

Almost surely, 2^19107949 is an apocalyptic number.

It is an amenable number.

19107949 is a deficient number, since it is larger than the sum of its proper divisors (4154387).

19107949 is a wasteful number, since it uses less digits than its factorization.

19107949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 19107949 is about 4371.2640048389. The cubic root of 19107949 is about 267.3445639622.

The spelling of 19107949 in words is "nineteen million, one hundred seven thousand, nine hundred forty-nine".