10421235440 has 80 divisors (see below), whose sum is σ = 30208066560. Its totient is φ = 3248175360.

The previous prime is 10421235427. The next prime is 10421235491. The reversal of 10421235440 is 4453212401.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 839720 + ... + 852039.

It is an arithmetic number, because the mean of its divisors is an integer number (377600832).

Almost surely, 2^10421235440 is an apocalyptic number.

10421235440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10421235440 is an abundant number, since it is smaller than the sum of its proper divisors (19786831120).

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

10421235440 is a wasteful number, since it uses less digits than its factorization.

10421235440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691790 (or 1691784 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 10421235440 its reverse (4453212401), we get a palindrome (14874447841).

The spelling of 10421235440 in words is "ten billion, four hundred twenty-one million, two hundred thirty-five thousand, four hundred forty".