21241792 has 84 divisors (see below), whose sum is σ = 50132488. Its totient is φ = 8870400.

The previous prime is 21241783. The next prime is 21241799. The reversal of 21241792 is 29714212.

It is a self number, because there is not a number n which added to its sum of digits gives 21241792.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241799) 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, 100567 + ... + 100777.

Almost surely, 2^21241792 is an apocalyptic number.

21241792 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21241792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25066244).

21241792 is an abundant number, since it is smaller than the sum of its proper divisors (28890696).

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

21241792 is a wasteful number, since it uses less digits than its factorization.

21241792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 237 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 21241792 is about 4608.8818600611. The cubic root of 21241792 is about 276.9472458804.

It can be divided in two parts, 2124 and 1792, that added together give a triangular number (3916 = T₈₈).

The spelling of 21241792 in words is "twenty-one million, two hundred forty-one thousand, seven hundred ninety-two".