20111233340 has 36 divisors (see below), whose sum is σ = 46422050808. Its totient is φ = 7313174880.

The previous prime is 20111233333. The next prime is 20111233357. The reversal of 20111233340 is 4333211102.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4152794 + ... + 4157633.

Almost surely, 2^20111233340 is an apocalyptic number.

20111233340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111233340 is an abundant number, since it is smaller than the sum of its proper divisors (26310817468).

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

20111233340 is a wasteful number, since it uses less digits than its factorization.

20111233340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8310458 (or 8310445 counting only the distinct ones).

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

Adding to 20111233340 its reverse (4333211102), we get a palindrome (24444444442).

The spelling of 20111233340 in words is "twenty billion, one hundred eleven million, two hundred thirty-three thousand, three hundred forty".