21496576590 has 96 divisors (see below), whose sum is σ = 57445614720. Its totient is φ = 5574546432.

The previous prime is 21496576579. The next prime is 21496576639. The reversal of 21496576590 is 9567569412.

21496576590 is a `hidden beast` number, since 2 + 1 + 49 + 6 + 5 + 7 + 6 + 590 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 647926 + ... + 680294.

It is an arithmetic number, because the mean of its divisors is an integer number (598391820).

Almost surely, 2^21496576590 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21496576590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28722807360).

21496576590 is an abundant number, since it is smaller than the sum of its proper divisors (35949038130).

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

21496576590 is a wasteful number, since it uses less digits than its factorization.

21496576590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32586 (or 32583 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 21496576590 in words is "twenty-one billion, four hundred ninety-six million, five hundred seventy-six thousand, five hundred ninety".