21953298 has 16 divisors (see below), whose sum is σ = 43993440. Its totient is φ = 7303296.

The previous prime is 21953279. The next prime is 21953299. The reversal of 21953298 is 89235912.

It is not an unprimeable number, because it can be changed into a prime (21953299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63 + ... + 6626.

It is an arithmetic number, because the mean of its divisors is an integer number (2749590).

Almost surely, 2^21953298 is an apocalyptic number.

21953298 is an abundant number, since it is smaller than the sum of its proper divisors (22040142).

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

21953298 is a wasteful number, since it uses less digits than its factorization.

21953298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7241.

The product of its digits is 38880, while the sum is 39.

The square root of 21953298 is about 4685.4346650017. The cubic root of 21953298 is about 280.0055185987.

The spelling of 21953298 in words is "twenty-one million, nine hundred fifty-three thousand, two hundred ninety-eight".