21560196 has 72 divisors (see below), whose sum is σ = 60162816. Its totient is φ = 5987520.

The previous prime is 21560171. The next prime is 21560197. The reversal of 21560196 is 69106512.

It is not an unprimeable number, because it can be changed into a prime (21560197) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21261 + ... + 22251.

Almost surely, 2^21560196 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 21560196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30081408).

21560196 is an abundant number, since it is smaller than the sum of its proper divisors (38602620).

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

21560196 is a wasteful number, since it uses less digits than its factorization.

21560196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049 (or 1040 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 21560196 is about 4643.2958122437. The cubic root of 21560196 is about 278.3241564936.

The spelling of 21560196 in words is "twenty-one million, five hundred sixty thousand, one hundred ninety-six".