20610240 has 112 divisors (see below), whose sum is σ = 74810112. Its totient is φ = 4709376.

The previous prime is 20610217. The next prime is 20610241. The reversal of 20610240 is 4201602.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (20610241) 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, 5187 + ... + 8253.

Almost surely, 2^20610240 is an apocalyptic number.

20610240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20610240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37405056).

20610240 is an abundant number, since it is smaller than the sum of its proper divisors (54199872).

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

20610240 is a wasteful number, since it uses less digits than its factorization.

20610240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3094 (or 3084 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20610240 is about 4539.8502177935. The cubic root of 20610240 is about 274.1748932265.

Adding to 20610240 its reverse (4201602), we get a palindrome (24811842).

The spelling of 20610240 in words is "twenty million, six hundred ten thousand, two hundred forty".