20398268 has 24 divisors (see below), whose sum is σ = 39118464. Its totient is φ = 9230000.

The previous prime is 20398243. The next prime is 20398277. The reversal of 20398268 is 86289302.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10121 + ... + 11967.

It is an arithmetic number, because the mean of its divisors is an integer number (1629936).

Almost surely, 2^20398268 is an apocalyptic number.

It is an amenable number.

20398268 is a deficient number, since it is larger than the sum of its proper divisors (18720196).

20398268 is a wasteful number, since it uses less digits than its factorization.

20398268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113 (or 2111 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 20398268 is about 4516.4441765619. Note that the first 3 decimals coincide. The cubic root of 20398268 is about 273.2317085358.

The spelling of 20398268 in words is "twenty million, three hundred ninety-eight thousand, two hundred sixty-eight".