203124400040 has 64 divisors (see below), whose sum is σ = 486711484560. Its totient is φ = 76028293120.

The previous prime is 203124400033. The next prime is 203124400069. The reversal of 203124400040 is 40004421302.

It can be written as a sum of positive squares in 8 ways, for example, as 196144465924 + 6979934116 = 442882^2 + 83546^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 203124399985 and 203124400021.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 745691 + ... + 980970.

Almost surely, 2^203124400040 is an apocalyptic number.

203124400040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203124400040 is an abundant number, since it is smaller than the sum of its proper divisors (283587084520).

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

203124400040 is a wasteful number, since it uses less digits than its factorization.

203124400040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726862 (or 1726858 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 203124400040 its reverse (40004421302), we get a palindrome (243128821342).

The spelling of 203124400040 in words is "two hundred three billion, one hundred twenty-four million, four hundred thousand, forty".