19974159 has 6 divisors (see below), whose sum is σ = 28851576. Its totient is φ = 13316100.

The previous prime is 19974139. The next prime is 19974169. The reversal of 19974159 is 95147991.

It is not a de Polignac number, because 19974159 - 2⁸ = 19973903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19974139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1109667 + ... + 1109684.

It is an arithmetic number, because the mean of its divisors is an integer number (4808596).

Almost surely, 2^19974159 is an apocalyptic number.

19974159 is a deficient number, since it is larger than the sum of its proper divisors (8877417).

19974159 is a wasteful number, since it uses less digits than its factorization.

19974159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219357 (or 2219354 counting only the distinct ones).

The product of its digits is 102060, while the sum is 45.

The square root of 19974159 is about 4469.2459095467. The cubic root of 19974159 is about 271.3248058314.

The spelling of 19974159 in words is "nineteen million, nine hundred seventy-four thousand, one hundred fifty-nine".