20133210021 has 8 divisors (see below), whose sum is σ = 26845775040. Its totient is φ = 13421392512.

The previous prime is 20133210017. The next prime is 20133210029. The reversal of 20133210021 is 12001233102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20133210021 - 2² = 20133210017 is a prime.

It is a super-2 number, since 2×20133210021² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133210029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120681 + ... + 234158.

It is an arithmetic number, because the mean of its divisors is an integer number (3355721880).

Almost surely, 2^20133210021 is an apocalyptic number.

It is an amenable number.

20133210021 is a deficient number, since it is larger than the sum of its proper divisors (6712565019).

20133210021 is a wasteful number, since it uses less digits than its factorization.

20133210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373755.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20133210021 its reverse (12001233102), we get a palindrome (32134443123).

The spelling of 20133210021 in words is "twenty billion, one hundred thirty-three million, two hundred ten thousand, twenty-one".