21610496 has 30 divisors (see below), whose sum is σ = 43252440. Its totient is φ = 10797056.

The previous prime is 21610493. The next prime is 21610499. The reversal of 21610496 is 69401612.

It is an interprime number because it is at equal distance from previous prime (21610493) and next prime (21610499).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21610493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15725 + ... + 17043.

It is an arithmetic number, because the mean of its divisors is an integer number (1441748).

Almost surely, 2^21610496 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 21610496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21626220).

21610496 is an abundant number, since it is smaller than the sum of its proper divisors (21641944).

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

21610496 is an frugal number, since it uses more digits than its factorization.

21610496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347 (or 1321 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 21610496 is about 4648.7090681177. The cubic root of 21610496 is about 278.5404320792.

The spelling of 21610496 in words is "twenty-one million, six hundred ten thousand, four hundred ninety-six".