10400024421 has 6 divisors (see below), whose sum is σ = 15022257510. Its totient is φ = 6933349608.

The previous prime is 10400024381. The next prime is 10400024447. The reversal of 10400024421 is 12442000401.

10400024421 is a `hidden beast` number, since 1 + 0 + 400 + 0 + 244 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7592508225 + 2807516196 = 87135^2 + 52986^2 .

It is not a de Polignac number, because 10400024421 - 2¹³ = 10400016229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10400024394 and 10400024403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10400024461) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 577779126 + ... + 577779143.

It is an arithmetic number, because the mean of its divisors is an integer number (2503709585).

Almost surely, 2^10400024421 is an apocalyptic number.

It is an amenable number.

10400024421 is a deficient number, since it is larger than the sum of its proper divisors (4622233089).

10400024421 is a wasteful number, since it uses less digits than its factorization.

10400024421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155558275 (or 1155558272 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 10400024421 its reverse (12442000401), we get a palindrome (22842024822).

The spelling of 10400024421 in words is "ten billion, four hundred million, twenty-four thousand, four hundred twenty-one".