10402124420 has 12 divisors (see below), whose sum is σ = 21844461324. Its totient is φ = 4160849760.

The previous prime is 10402124413. The next prime is 10402124423. The reversal of 10402124420 is 2442120401.

It can be written as a sum of positive squares in 2 ways, for example, as 5688478084 + 4713646336 = 75422^2 + 68656^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 520106221 = 10402124420 / (1 + 0 + 4 + 0 + 2 + 1 + 2 + 4 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 10402124392 and 10402124401.

It is not an unprimeable number, because it can be changed into a prime (10402124423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260053091 + ... + 260053130.

It is an arithmetic number, because the mean of its divisors is an integer number (1820371777).

Almost surely, 2^10402124420 is an apocalyptic number.

10402124420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10402124420 is an abundant number, since it is smaller than the sum of its proper divisors (11442336904).

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

10402124420 is a wasteful number, since it uses less digits than its factorization.

10402124420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520106230 (or 520106228 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 10402124420 its reverse (2442120401), we get a palindrome (12844244821).

The spelling of 10402124420 in words is "ten billion, four hundred two million, one hundred twenty-four thousand, four hundred twenty".