19413819 has 6 divisors (see below), whose sum is σ = 28042196. Its totient is φ = 12942540.

The previous prime is 19413809. The next prime is 19413827. The reversal of 19413819 is 91831491.

It is not a de Polignac number, because 19413819 - 2¹¹ = 19411771 is a prime.

It is a super-2 number, since 2×19413819² = 753792736329522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19413809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1078537 + ... + 1078554.

Almost surely, 2^19413819 is an apocalyptic number.

19413819 is a deficient number, since it is larger than the sum of its proper divisors (8628377).

19413819 is a wasteful number, since it uses less digits than its factorization.

19413819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157097 (or 2157094 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 19413819 is about 4406.1115510164. Note that the first 3 decimals coincide. The cubic root of 19413819 is about 268.7635230981.

The spelling of 19413819 in words is "nineteen million, four hundred thirteen thousand, eight hundred nineteen".