20131033340 has 96 divisors (see below), whose sum is σ = 47518833600. Its totient is φ = 7101388800.

The previous prime is 20131033303. The next prime is 20131033367. The reversal of 20131033340 is 4333013102.

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 31 ways as a sum of consecutive naturals, for example, 969386 + ... + 989934.

It is an arithmetic number, because the mean of its divisors is an integer number (494987850).

Almost surely, 2^20131033340 is an apocalyptic number.

20131033340 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 20131033340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23759416800).

20131033340 is an abundant number, since it is smaller than the sum of its proper divisors (27387800260).

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

20131033340 is a wasteful number, since it uses less digits than its factorization.

20131033340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20703 (or 20701 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20131033340 its reverse (4333013102), we get a palindrome (24464046442).

The spelling of 20131033340 in words is "twenty billion, one hundred thirty-one million, thirty-three thousand, three hundred forty".