19930842 has 12 divisors (see below), whose sum is σ = 43183530. Its totient is φ = 6643608.

The previous prime is 19930787. The next prime is 19930843. The reversal of 19930842 is 24803991.

It can be written as a sum of positive squares in only one way, i.e., 14356521 + 5574321 = 3789^2 + 2361^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19930797 and 19930806.

It is not an unprimeable number, because it can be changed into a prime (19930843) 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, 553617 + ... + 553652.

Almost surely, 2^19930842 is an apocalyptic number.

19930842 is an abundant number, since it is smaller than the sum of its proper divisors (23252688).

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

19930842 is a wasteful number, since it uses less digits than its factorization.

19930842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107277 (or 1107274 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 19930842 is about 4464.3971597518. The cubic root of 19930842 is about 271.1285275149.

The spelling of 19930842 in words is "nineteen million, nine hundred thirty thousand, eight hundred forty-two".