19951042 has 16 divisors (see below), whose sum is σ = 31272192. Its totient is φ = 9534960.

The previous prime is 19951039. The next prime is 19951049. The reversal of 19951042 is 24015991.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 19950995 and 19951013.

It is not an unprimeable number, because it can be changed into a prime (19951049) 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 7 ways as a sum of consecutive naturals, for example, 3208 + ... + 7084.

It is an arithmetic number, because the mean of its divisors is an integer number (1954512).

Almost surely, 2^19951042 is an apocalyptic number.

19951042 is a deficient number, since it is larger than the sum of its proper divisors (11321150).

19951042 is a wasteful number, since it uses less digits than its factorization.

19951042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 19951042 is about 4466.6589303416. The cubic root of 19951042 is about 271.2200932575.

The spelling of 19951042 in words is "nineteen million, nine hundred fifty-one thousand, forty-two".