19993942 has 8 divisors (see below), whose sum is σ = 30159000. Its totient is φ = 9940944.

The previous prime is 19993927. The next prime is 19993943. The reversal of 19993942 is 24939991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 19993892 and 19993901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19993943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27567 + ... + 28282.

It is an arithmetic number, because the mean of its divisors is an integer number (3769875).

Almost surely, 2^19993942 is an apocalyptic number.

19993942 is a deficient number, since it is larger than the sum of its proper divisors (10165058).

19993942 is a wasteful number, since it uses less digits than its factorization.

19993942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56030.

The product of its digits is 157464, while the sum is 46.

The square root of 19993942 is about 4471.4585987125. The cubic root of 19993942 is about 271.4143523220.

It can be divided in two parts, 1999394 and 2, that added together give a square (1999396 = 1414²).

The spelling of 19993942 in words is "nineteen million, nine hundred ninety-three thousand, nine hundred forty-two".