18401922 has 144 divisors (see below), whose sum is σ = 53778816. Its totient is φ = 4435200.

The previous prime is 18401857. The next prime is 18401927. The reversal of 18401922 is 22910481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18401927) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 259147 + ... + 259217.

It is an arithmetic number, because the mean of its divisors is an integer number (373464).

Almost surely, 2^18401922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18401922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26889408).

18401922 is an abundant number, since it is smaller than the sum of its proper divisors (35376894).

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

18401922 is a wasteful number, since it uses less digits than its factorization.

18401922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 18401922 is about 4289.7461463355. The cubic root of 18401922 is about 264.0104162557.

It can be divided in two parts, 184019 and 22, that added together give a square (184041 = 429²).

The spelling of 18401922 in words is "eighteen million, four hundred one thousand, nine hundred twenty-two".