20442510 has 64 divisors (see below), whose sum is σ = 59477760. Its totient is φ = 4955040.

The previous prime is 20442479. The next prime is 20442511. The reversal of 20442510 is 1524402.

20442510 is nontrivially palindromic in base 12.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 472 + ... + 6411.

It is an arithmetic number, because the mean of its divisors is an integer number (929340).

Almost surely, 2^20442510 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20442510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29738880).

20442510 is an abundant number, since it is smaller than the sum of its proper divisors (39035250).

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

20442510 is a wasteful number, since it uses less digits than its factorization.

20442510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6910 (or 6904 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 20442510 is about 4521.3394033184. The cubic root of 20442510 is about 273.4291041885.

Adding to 20442510 its reverse (1524402), we get a palindrome (21966912).

It can be divided in two parts, 2044 and 2510, that added together give a palindrome (4554).

The spelling of 20442510 in words is "twenty million, four hundred forty-two thousand, five hundred ten".