194250021 has 16 divisors (see below), whose sum is σ = 296239104. Its totient is φ = 110910384.

The previous prime is 194249989. The next prime is 194250031. The reversal of 194250021 is 120052491.

It is not a de Polignac number, because 194250021 - 2⁵ = 194249989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 194249973 and 194250000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194250031) 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 15 ways as a sum of consecutive naturals, for example, 29956 + ... + 35858.

It is an arithmetic number, because the mean of its divisors is an integer number (18514944).

Almost surely, 2^194250021 is an apocalyptic number.

It is an amenable number.

194250021 is a deficient number, since it is larger than the sum of its proper divisors (101989083).

194250021 is a wasteful number, since it uses less digits than its factorization.

194250021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7480.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 194250021 is about 13937.3606181371. The cubic root of 194250021 is about 579.1446180198.

The spelling of 194250021 in words is "one hundred ninety-four million, two hundred fifty thousand, twenty-one".