21438362 has 16 divisors (see below), whose sum is σ = 35361792. Its totient is φ = 9666720.

The previous prime is 21438359. The next prime is 21438401. The reversal of 21438362 is 26383412.

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, 1043 + ... + 6630.

It is an arithmetic number, because the mean of its divisors is an integer number (2210112).

Almost surely, 2^21438362 is an apocalyptic number.

21438362 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21438362 is a deficient number, since it is larger than the sum of its proper divisors (13923430).

21438362 is a wasteful number, since it uses less digits than its factorization.

21438362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7813.

The product of its digits is 6912, while the sum is 29.

The square root of 21438362 is about 4630.1578806775. The cubic root of 21438362 is about 277.7989074179.

The spelling of 21438362 in words is "twenty-one million, four hundred thirty-eight thousand, three hundred sixty-two".