20403433140 has 192 divisors, whose sum is σ = 60074784000. Its totient is φ = 5167411200.

The previous prime is 20403433139. The next prime is 20403433163. The reversal of 20403433140 is 4133430402.

It is a self number, because there is not a number n which added to its sum of digits gives 20403433140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33948840 + ... + 33949440.

It is an arithmetic number, because the mean of its divisors is an integer number (312889500).

Almost surely, 2^20403433140 is an apocalyptic number.

20403433140 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 20403433140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30037392000).

20403433140 is an abundant number, since it is smaller than the sum of its proper divisors (39671350860).

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

20403433140 is a wasteful number, since it uses less digits than its factorization.

20403433140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930 (or 928 counting only the distinct ones).

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

Adding to 20403433140 its reverse (4133430402), we get a palindrome (24536863542).

The spelling of 20403433140 in words is "twenty billion, four hundred three million, four hundred thirty-three thousand, one hundred forty".