10203172440 has 64 divisors (see below), whose sum is σ = 31321382400. Its totient is φ = 2657569152.

The previous prime is 10203172433. The next prime is 10203172453. The reversal of 10203172440 is 4427130201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 10203172440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 983520 + ... + 993839.

It is an arithmetic number, because the mean of its divisors is an integer number (489396600).

Almost surely, 2^10203172440 is an apocalyptic number.

10203172440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10203172440 is an abundant number, since it is smaller than the sum of its proper divisors (21118209960).

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

10203172440 is a wasteful number, since it uses less digits than its factorization.

10203172440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977416 (or 1977412 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

It can be divided in two parts, 102031 and 72440, that added together give a palindrome (174471).

The spelling of 10203172440 in words is "ten billion, two hundred three million, one hundred seventy-two thousand, four hundred forty".