21141588 has 48 divisors (see below), whose sum is σ = 54048960. Its totient is φ = 6392064.

The previous prime is 21141581. The next prime is 21141607. The reversal of 21141588 is 88514112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141581) 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, 8056 + ... + 10352.

It is an arithmetic number, because the mean of its divisors is an integer number (1126020).

Almost surely, 2^21141588 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 21141588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27024480).

21141588 is an abundant number, since it is smaller than the sum of its proper divisors (32907372).

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

21141588 is a wasteful number, since it uses less digits than its factorization.

21141588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376 (or 2374 counting only the distinct ones).

The product of its digits is 2560, while the sum is 30.

The square root of 21141588 is about 4597.9982601128. The cubic root of 21141588 is about 276.5110778218.

The spelling of 21141588 in words is "twenty-one million, one hundred forty-one thousand, five hundred eighty-eight".