21383498 has 16 divisors (see below), whose sum is σ = 33454080. Its totient is φ = 10238256.

The previous prime is 21383497. The next prime is 21383503. The reversal of 21383498 is 89438312.

It is a super-3 number, since 3×21383498³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21383497) 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, 5915 + ... + 8817.

It is an arithmetic number, because the mean of its divisors is an integer number (2090880).

Almost surely, 2^21383498 is an apocalyptic number.

21383498 is a deficient number, since it is larger than the sum of its proper divisors (12070582).

21383498 is a wasteful number, since it uses less digits than its factorization.

21383498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061.

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

The square root of 21383498 is about 4624.2294493245. The cubic root of 21383498 is about 277.5617285506.

The spelling of 21383498 in words is "twenty-one million, three hundred eighty-three thousand, four hundred ninety-eight".