20133231140 has 72 divisors (see below), whose sum is σ = 47461873536. Its totient is φ = 7165364800.

The previous prime is 20133231091. The next prime is 20133231163. The reversal of 20133231140 is 4113233102.

It is a super-2 number, since 2×20133231140² (a number of 21 digits) contains 22 as substring.

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, 25235 + ... + 202245.

It is an arithmetic number, because the mean of its divisors is an integer number (659192688).

Almost surely, 2^20133231140 is an apocalyptic number.

20133231140 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 20133231140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23730936768).

20133231140 is an abundant number, since it is smaller than the sum of its proper divisors (27328642396).

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

20133231140 is a wasteful number, since it uses less digits than its factorization.

20133231140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177089 (or 177076 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20133231140 its reverse (4113233102), we get a palindrome (24246464242).

The spelling of 20133231140 in words is "twenty billion, one hundred thirty-three million, two hundred thirty-one thousand, one hundred forty".