19942156 has 36 divisors (see below), whose sum is σ = 39954208. Its totient is φ = 8656128.

The previous prime is 19942129. The next prime is 19942187. The reversal of 19942156 is 65124991.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14365 + ... + 15691.

Almost surely, 2^19942156 is an apocalyptic number.

It is an amenable number.

19942156 is an abundant number, since it is smaller than the sum of its proper divisors (20012052).

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

19942156 is a wasteful number, since it uses less digits than its factorization.

19942156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378 (or 1359 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 19942156 is about 4465.6641163437. The cubic root of 19942156 is about 271.1798210144.

The spelling of 19942156 in words is "nineteen million, nine hundred forty-two thousand, one hundred fifty-six".