2194421853 has 16 divisors (see below), whose sum is σ = 3316806080. Its totient is φ = 1279338624.

The previous prime is 2194421843. The next prime is 2194421941. The reversal of 2194421853 is 3581244912.

It is not a de Polignac number, because 2194421853 - 2⁵ = 2194421821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2194421843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1479976 + ... + 1481457.

It is an arithmetic number, because the mean of its divisors is an integer number (207300380).

Almost surely, 2^2194421853 is an apocalyptic number.

It is an amenable number.

2194421853 is a deficient number, since it is larger than the sum of its proper divisors (1122384227).

2194421853 is a wasteful number, since it uses less digits than its factorization.

2194421853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961468.

The product of its digits is 69120, while the sum is 39.

The square root of 2194421853 is about 46844.6566109733. The cubic root of 2194421853 is about 1299.4912907041.

The spelling of 2194421853 in words is "two billion, one hundred ninety-four million, four hundred twenty-one thousand, eight hundred fifty-three".