20449998 has 12 divisors (see below), whose sum is σ = 44308368. Its totient is φ = 6816660.

The previous prime is 20449993. The next prime is 20449999. The reversal of 20449998 is 89994402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20449991) 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 5 ways as a sum of consecutive naturals, for example, 568038 + ... + 568073.

It is an arithmetic number, because the mean of its divisors is an integer number (3692364).

Almost surely, 2^20449998 is an apocalyptic number.

20449998 is an abundant number, since it is smaller than the sum of its proper divisors (23858370).

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

20449998 is a wasteful number, since it uses less digits than its factorization.

20449998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136119 (or 1136116 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 20449998 is about 4522.1674007051. The cubic root of 20449998 is about 273.4624853991.

The spelling of 20449998 in words is "twenty million, four hundred forty-nine thousand, nine hundred ninety-eight".