203442040100 has 72 divisors (see below), whose sum is σ = 476799566208. Its totient is φ = 74900419200.

The previous prime is 203442040051. The next prime is 203442040141. The reversal of 203442040100 is 1040244302.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 225605 + ... + 676595.

Almost surely, 2^203442040100 is an apocalyptic number.

203442040100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203442040100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238399783104).

203442040100 is an abundant number, since it is smaller than the sum of its proper divisors (273357526108).

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

203442040100 is a wasteful number, since it uses less digits than its factorization.

203442040100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451365 (or 451358 counting only the distinct ones).

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

Adding to 203442040100 its reverse (1040244302), we get a palindrome (204482284402).

The spelling of 203442040100 in words is "two hundred three billion, four hundred forty-two million, forty thousand, one hundred".