133401232020 has 96 divisors (see below), whose sum is σ = 426950092800. Its totient is φ = 30486985344.

The previous prime is 133401231989. The next prime is 133401232021. The reversal of 133401232020 is 20232104331.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133401232021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3187591 + ... + 3229169.

It is an arithmetic number, because the mean of its divisors is an integer number (4447396800).

Almost surely, 2^133401232020 is an apocalyptic number.

133401232020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133401232020 is an abundant number, since it is smaller than the sum of its proper divisors (293548860780).

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

133401232020 is a wasteful number, since it uses less digits than its factorization.

133401232020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49237 (or 49235 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 133401232020 its reverse (20232104331), we get a palindrome (153633336351).

The spelling of 133401232020 in words is "one hundred thirty-three billion, four hundred one million, two hundred thirty-two thousand, twenty".