20403413312 has 56 divisors (see below), whose sum is σ = 41563722816. Its totient is φ = 9932203008.

The previous prime is 20403413309. The next prime is 20403413341. The reversal of 20403413312 is 21331430402.

It is a congruent number.

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, 849533 + ... + 873219.

It is an arithmetic number, because the mean of its divisors is an integer number (742209336).

Almost surely, 2^20403413312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20403413312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20781861408).

20403413312 is an abundant number, since it is smaller than the sum of its proper divisors (21160309504).

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

20403413312 is a wasteful number, since it uses less digits than its factorization.

20403413312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24055 (or 24045 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20403413312 its reverse (21331430402), we get a palindrome (41734843714).

The spelling of 20403413312 in words is "twenty billion, four hundred three million, four hundred thirteen thousand, three hundred twelve".