20423135232104 has 64 divisors (see below), whose sum is σ = 42411522447360. Its totient is φ = 9141791567040.

The previous prime is 20423135232103. The next prime is 20423135232173. The reversal of 20423135232104 is 40123253132402.

It is not an unprimeable number, because it can be changed into a prime (20423135232103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18125759 + ... + 19219505.

It is an arithmetic number, because the mean of its divisors is an integer number (662680038240).

Almost surely, 2^{20423135232104} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20423135232104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21205761223680).

20423135232104 is an abundant number, since it is smaller than the sum of its proper divisors (21988387215256).

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

20423135232104 is a wasteful number, since it uses less digits than its factorization.

20423135232104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096998 (or 1096994 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 20423135232104 its reverse (40123253132402), we get a palindrome (60546388364506).

The spelling of 20423135232104 in words is "twenty trillion, four hundred twenty-three billion, one hundred thirty-five million, two hundred thirty-two thousand, one hundred four".