19942893 has 12 divisors (see below), whose sum is σ = 29350620. Its totient is φ = 13044096.

The previous prime is 19942891. The next prime is 19942919. The reversal of 19942893 is 39824991.

It can be written as a sum of positive squares in 2 ways, for example, as 10227204 + 9715689 = 3198^2 + 3117^2 .

It is not a de Polignac number, because 19942893 - 2¹ = 19942891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19942891) 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 11 ways as a sum of consecutive naturals, for example, 20428 + ... + 21381.

It is an arithmetic number, because the mean of its divisors is an integer number (2445885).

Almost surely, 2^19942893 is an apocalyptic number.

It is an amenable number.

19942893 is a deficient number, since it is larger than the sum of its proper divisors (9407727).

19942893 is a wasteful number, since it uses less digits than its factorization.

19942893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41868 (or 41865 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 19942893 is about 4465.7466341027. The cubic root of 19942893 is about 271.1831616272.

The spelling of 19942893 in words is "nineteen million, nine hundred forty-two thousand, eight hundred ninety-three".