10421031440 has 20 divisors (see below), whose sum is σ = 24228898284. Its totient is φ = 4168412544.

The previous prime is 10421031371. The next prime is 10421031443. The reversal of 10421031440 is 4413012401.

It can be written as a sum of positive squares in 2 ways, for example, as 7595471104 + 2825560336 = 87152^2 + 53156^2 .

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

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

It is not an unprimeable number, because it can be changed into a prime (10421031443) 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, 65131367 + ... + 65131526.

Almost surely, 2^10421031440 is an apocalyptic number.

10421031440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10421031440 is an abundant number, since it is smaller than the sum of its proper divisors (13807866844).

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

10421031440 is a wasteful number, since it uses less digits than its factorization.

10421031440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130262906 (or 130262900 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 10421031440 its reverse (4413012401), we get a palindrome (14834043841).

The spelling of 10421031440 in words is "ten billion, four hundred twenty-one million, thirty-one thousand, four hundred forty".