21260792 has 64 divisors (see below), whose sum is σ = 48445440. Its totient is φ = 8553600.

The previous prime is 21260749. The next prime is 21260797. The reversal of 21260792 is 29706212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21260797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64067 + ... + 64397.

It is an arithmetic number, because the mean of its divisors is an integer number (756960).

Almost surely, 2^21260792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21260792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24222720).

21260792 is an abundant number, since it is smaller than the sum of its proper divisors (27184648).

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

21260792 is a wasteful number, since it uses less digits than its factorization.

21260792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 21260792 is about 4610.9426368152. The cubic root of 21260792 is about 277.0297943076.

The spelling of 21260792 in words is "twenty-one million, two hundred sixty thousand, seven hundred ninety-two".