20533333720 has 64 divisors (see below), whose sum is σ = 51044541120. Its totient is φ = 7394095104.

The previous prime is 20533333673. The next prime is 20533333757. The reversal of 20533333720 is 2733333502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 640797 + ... + 672076.

It is an arithmetic number, because the mean of its divisors is an integer number (797570955).

Almost surely, 2^20533333720 is an apocalyptic number.

20533333720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20533333720 is an abundant number, since it is smaller than the sum of its proper divisors (30511207400).

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

20533333720 is a wasteful number, since it uses less digits than its factorization.

20533333720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312924 (or 1312920 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 31.

The spelling of 20533333720 in words is "twenty billion, five hundred thirty-three million, three hundred thirty-three thousand, seven hundred twenty".