21419398 has 48 divisors (see below), whose sum is σ = 43428096. Its totient is φ = 7693920.

The previous prime is 21419393. The next prime is 21419399. The reversal of 21419398 is 89391412.

It is a super-2 number, since 2×21419398² = 917581221364808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21419393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25615 + ... + 26437.

It is an arithmetic number, because the mean of its divisors is an integer number (904752).

Almost surely, 2^21419398 is an apocalyptic number.

21419398 is an abundant number, since it is smaller than the sum of its proper divisors (22008698).

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

21419398 is a wasteful number, since it uses less digits than its factorization.

21419398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869 (or 856 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 21419398 is about 4628.1095492652. The cubic root of 21419398 is about 277.7169712354.

The spelling of 21419398 in words is "twenty-one million, four hundred nineteen thousand, three hundred ninety-eight".