19794481 has 6 divisors (see below), whose sum is σ = 23026290. Its totient is φ = 16966656.

The previous prime is 19794479. The next prime is 19794497. The reversal of 19794481 is 18449791.

It can be written as a sum of positive squares in only one way, i.e., 14130081 + 5664400 = 3759^2 + 2380^2 .

It is not a de Polignac number, because 19794481 - 2¹ = 19794479 is a prime.

It is a super-2 number, since 2×19794481² = 783642956118722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19794581) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201936 + ... + 202033.

It is an arithmetic number, because the mean of its divisors is an integer number (3837715).

Almost surely, 2^19794481 is an apocalyptic number.

It is an amenable number.

19794481 is a deficient number, since it is larger than the sum of its proper divisors (3231809).

19794481 is an equidigital number, since it uses as much as digits as its factorization.

19794481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403983 (or 403976 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 19794481 is about 4449.0988975297. The cubic root of 19794481 is about 270.5087845920.

It can be divided in two parts, 197944 and 81, that added together give a square (198025 = 445²).

The spelling of 19794481 in words is "nineteen million, seven hundred ninety-four thousand, four hundred eighty-one".