203403123020040 has 32 divisors (see below), whose sum is σ = 610209369060480. Its totient is φ = 54240832805312.

The previous prime is 203403123020017. The next prime is 203403123020081. The reversal of 203403123020040 is 40020321304302.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 847513012464 + ... + 847513012703.

It is an arithmetic number, because the mean of its divisors is an integer number (19069042783140).

Almost surely, 2^{203403123020040} is an apocalyptic number.

203403123020040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203403123020040 is an abundant number, since it is smaller than the sum of its proper divisors (406806246040440).

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

203403123020040 is a wasteful number, since it uses less digits than its factorization.

203403123020040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695026025181 (or 1695026025177 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 203403123020040 its reverse (40020321304302), we get a palindrome (243423444324342).

The spelling of 203403123020040 in words is "two hundred three trillion, four hundred three billion, one hundred twenty-three million, twenty thousand, forty".