19642424 has 8 divisors (see below), whose sum is σ = 36829560. Its totient is φ = 9821208.

The previous prime is 19642421. The next prime is 19642439. The reversal of 19642424 is 42424691.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19642421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1227644 + ... + 1227659.

It is an arithmetic number, because the mean of its divisors is an integer number (4603695).

Almost surely, 2^19642424 is an apocalyptic number.

It is an amenable number.

19642424 is a deficient number, since it is larger than the sum of its proper divisors (17187136).

19642424 is a wasteful number, since it uses less digits than its factorization.

19642424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455309 (or 2455305 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 19642424 is about 4431.9774367657. The cubic root of 19642424 is about 269.8143396703.

The spelling of 19642424 in words is "nineteen million, six hundred forty-two thousand, four hundred twenty-four".