203012112440 has 16 divisors (see below), whose sum is σ = 456777253080. Its totient is φ = 81204844960.

The previous prime is 203012112427. The next prime is 203012112493. The reversal of 203012112440 is 44211210302.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2537651366 + ... + 2537651445.

Almost surely, 2^203012112440 is an apocalyptic number.

203012112440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203012112440 is an abundant number, since it is smaller than the sum of its proper divisors (253765140640).

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

203012112440 is a wasteful number, since it uses less digits than its factorization.

203012112440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5075302822 (or 5075302818 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 203012112440 its reverse (44211210302), we get a palindrome (247223322742).

The spelling of 203012112440 in words is "two hundred three billion, twelve million, one hundred twelve thousand, four hundred forty".