10420403240 has 128 divisors (see below), whose sum is σ = 26769899520. Its totient is φ = 3622579200.

The previous prime is 10420403179. The next prime is 10420403267. The reversal of 10420403240 is 4230402401.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 587705 + ... + 605175.

It is an arithmetic number, because the mean of its divisors is an integer number (209139840).

Almost surely, 2^10420403240 is an apocalyptic number.

10420403240 is a gapful number since it is divisible by the number (10) 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 10420403240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13384949760).

10420403240 is an abundant number, since it is smaller than the sum of its proper divisors (16349496280).

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

10420403240 is a wasteful number, since it uses less digits than its factorization.

10420403240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17563 (or 17559 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 10420403240 its reverse (4230402401), we get a palindrome (14650805641).

The spelling of 10420403240 in words is "ten billion, four hundred twenty million, four hundred three thousand, two hundred forty".