10020400240 has 20 divisors (see below), whose sum is σ = 23297430744. Its totient is φ = 4008160064.

The previous prime is 10020400237. The next prime is 10020400249. The reversal of 10020400240 is 4200402001.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 10020400240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10020400249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62627422 + ... + 62627581.

Almost surely, 2^10020400240 is an apocalyptic number.

10020400240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10020400240 is an abundant number, since it is smaller than the sum of its proper divisors (13277030504).

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

10020400240 is a wasteful number, since it uses less digits than its factorization.

10020400240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125255016 (or 125255010 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 10020400240 its reverse (4200402001), we get a palindrome (14220802241).

The spelling of 10020400240 in words is "ten billion, twenty million, four hundred thousand, two hundred forty".