20345032142221 has 8 divisors (see below), whose sum is σ = 20351372600000. Its totient is φ = 20338692343200.

The previous prime is 20345032142173. The next prime is 20345032142231. The reversal of 20345032142221 is 12224123054302.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20345032142221 - 2³³ = 20336442207629 is a prime.

It is a super-2 number, since 2×20345032142221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345032142231) 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, 65670160 + ... + 65979238.

It is an arithmetic number, because the mean of its divisors is an integer number (2543921575000).

Almost surely, 2^{20345032142221} is an apocalyptic number.

It is an amenable number.

20345032142221 is a deficient number, since it is larger than the sum of its proper divisors (6340457779).

20345032142221 is a wasteful number, since it uses less digits than its factorization.

20345032142221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329379.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 20345032142221 its reverse (12224123054302), we get a palindrome (32569155196523).

The spelling of 20345032142221 in words is "twenty trillion, three hundred forty-five billion, thirty-two million, one hundred forty-two thousand, two hundred twenty-one".