21238348 has 24 divisors (see below), whose sum is σ = 39029760. Its totient is φ = 10098960.

The previous prime is 21238307. The next prime is 21238351. The reversal of 21238348 is 84383212.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 5865 + ... + 8767.

It is an arithmetic number, because the mean of its divisors is an integer number (1626240).

Almost surely, 2^21238348 is an apocalyptic number.

It is an amenable number.

21238348 is a deficient number, since it is larger than the sum of its proper divisors (17791412).

21238348 is a wasteful number, since it uses less digits than its factorization.

21238348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997 (or 2995 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The square root of 21238348 is about 4608.5082185019. The cubic root of 21238348 is about 276.9322776224.

The spelling of 21238348 in words is "twenty-one million, two hundred thirty-eight thousand, three hundred forty-eight".