19954928 has 20 divisors (see below), whose sum is σ = 44186160. Its totient is φ = 8552064.

The previous prime is 19954927. The next prime is 19954933. The reversal of 19954928 is 82945991.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19954927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88973 + ... + 89196.

It is an arithmetic number, because the mean of its divisors is an integer number (2209308).

Almost surely, 2^19954928 is an apocalyptic number.

It is an amenable number.

19954928 is an abundant number, since it is smaller than the sum of its proper divisors (24231232).

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

19954928 is a wasteful number, since it uses less digits than its factorization.

19954928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178184 (or 178178 counting only the distinct ones).

The product of its digits is 233280, while the sum is 47.

The square root of 19954928 is about 4467.0939099150. The cubic root of 19954928 is about 271.2377012411.

The spelling of 19954928 in words is "nineteen million, nine hundred fifty-four thousand, nine hundred twenty-eight".