19995954 has 16 divisors (see below), whose sum is σ = 43627680. Its totient is φ = 6059360.

The previous prime is 19995953. The next prime is 19995959. The reversal of 19995954 is 45959991.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19995897 and 19995906.

It is not an unprimeable number, because it can be changed into a prime (19995953) 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, 151419 + ... + 151550.

It is an arithmetic number, because the mean of its divisors is an integer number (2726730).

Almost surely, 2^19995954 is an apocalyptic number.

19995954 is an abundant number, since it is smaller than the sum of its proper divisors (23631726).

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

19995954 is a wasteful number, since it uses less digits than its factorization.

19995954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302985.

The product of its digits is 656100, while the sum is 51.

The square root of 19995954 is about 4471.6835755675. The cubic root of 19995954 is about 271.4234562022.

The spelling of 19995954 in words is "nineteen million, nine hundred ninety-five thousand, nine hundred fifty-four".