19942434 has 12 divisors (see below), whose sum is σ = 43208646. Its totient is φ = 6647472.

The previous prime is 19942423. The next prime is 19942451. The reversal of 19942434 is 43424991.

It can be written as a sum of positive squares in only one way, i.e., 16426809 + 3515625 = 4053^2 + 1875^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 553939 + ... + 553974.

Almost surely, 2^19942434 is an apocalyptic number.

19942434 is an abundant number, since it is smaller than the sum of its proper divisors (23266212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19942434 is a wasteful number, since it uses less digits than its factorization.

19942434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107921 (or 1107918 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 19942434 is about 4465.6952426246. The cubic root of 19942434 is about 271.1810811195.

The spelling of 19942434 in words is "nineteen million, nine hundred forty-two thousand, four hundred thirty-four".