20133031380 has 384 divisors, whose sum is σ = 72007004160. Its totient is φ = 4082012160.

The previous prime is 20133031379. The next prime is 20133031397. The reversal of 20133031380 is 8313033102.

It is a self number, because there is not a number n which added to its sum of digits gives 20133031380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 63510982 + ... + 63511298.

It is an arithmetic number, because the mean of its divisors is an integer number (187518240).

Almost surely, 2^20133031380 is an apocalyptic number.

20133031380 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 20133031380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36003502080).

20133031380 is an abundant number, since it is smaller than the sum of its proper divisors (51873972780).

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

20133031380 is a wasteful number, since it uses less digits than its factorization.

20133031380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 20133031380 its reverse (8313033102), we get a palindrome (28446064482).

The spelling of 20133031380 in words is "twenty billion, one hundred thirty-three million, thirty-one thousand, three hundred eighty".