21141792 has 72 divisors (see below), whose sum is σ = 68717376. Its totient is φ = 6039936.

The previous prime is 21141787. The next prime is 21141793. The reversal of 21141792 is 29714112.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is not an unprimeable number, because it can be changed into a prime (21141793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3228 + ... + 7259.

It is an arithmetic number, because the mean of its divisors is an integer number (954408).

Almost surely, 2^21141792 is an apocalyptic number.

It is an amenable number.

21141792 is an abundant number, since it is smaller than the sum of its proper divisors (47575584).

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

21141792 is a wasteful number, since it uses less digits than its factorization.

21141792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10510 (or 10499 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 21141792 is about 4598.0204436257. The cubic root of 21141792 is about 276.5119671917.

The spelling of 21141792 in words is "twenty-one million, one hundred forty-one thousand, seven hundred ninety-two".