21201376 has 24 divisors (see below), whose sum is σ = 47703600. Its totient is φ = 9086208.

The previous prime is 21201373. The next prime is 21201379. The reversal of 21201376 is 67310212.

It is an interprime number because it is at equal distance from previous prime (21201373) and next prime (21201379).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47101 + ... + 47548.

It is an arithmetic number, because the mean of its divisors is an integer number (1987650).

Almost surely, 2^21201376 is an apocalyptic number.

It is an amenable number.

21201376 is an abundant number, since it is smaller than the sum of its proper divisors (26502224).

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

21201376 is an equidigital number, since it uses as much as digits as its factorization.

21201376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94666 (or 94658 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 21201376 is about 4604.4951949155. The cubic root of 21201376 is about 276.7714884819.

Adding to 21201376 its reverse (67310212), we get a palindrome (88511588).

The spelling of 21201376 in words is "twenty-one million, two hundred one thousand, three hundred seventy-six".