21968298 has 24 divisors (see below), whose sum is σ = 51925536. Its totient is φ = 6657000.

The previous prime is 21968293. The next prime is 21968321. The reversal of 21968298 is 89286912.

It is a super-2 number, since 2×21968298² = 965212234033608, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21968293) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55278 + ... + 55673.

It is an arithmetic number, because the mean of its divisors is an integer number (2163564).

Almost surely, 2^21968298 is an apocalyptic number.

21968298 is an abundant number, since it is smaller than the sum of its proper divisors (29957238).

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

21968298 is a wasteful number, since it uses less digits than its factorization.

21968298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110970 (or 110967 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 21968298 is about 4687.0350969456. The cubic root of 21968298 is about 280.0692770759.

The spelling of 21968298 in words is "twenty-one million, nine hundred sixty-eight thousand, two hundred ninety-eight".