20133201520 has 20 divisors (see below), whose sum is σ = 46809693720. Its totient is φ = 8053280576.

The previous prime is 20133201499. The next prime is 20133201551. The reversal of 20133201520 is 2510233102.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125832430 + ... + 125832589.

It is an arithmetic number, because the mean of its divisors is an integer number (2340484686).

Almost surely, 2^20133201520 is an apocalyptic number.

20133201520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20133201520 is an abundant number, since it is smaller than the sum of its proper divisors (26676492200).

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

20133201520 is a wasteful number, since it uses less digits than its factorization.

20133201520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251665032 (or 251665026 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 20133201520 its reverse (2510233102), we get a palindrome (22643434622).

The spelling of 20133201520 in words is "twenty billion, one hundred thirty-three million, two hundred one thousand, five hundred twenty".