20423120404215 has 16 divisors (see below), whose sum is σ = 34097731458048. Its totient is φ = 10418751278496.

The previous prime is 20423120404163. The next prime is 20423120404223. The reversal of 20423120404215 is 51240402132402.

It is a happy number.

It is not a de Polignac number, because 20423120404215 - 2⁷ = 20423120404087 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29598724879 + ... + 29598725568.

It is an arithmetic number, because the mean of its divisors is an integer number (2131108216128).

Almost surely, 2^{20423120404215} is an apocalyptic number.

20423120404215 is a deficient number, since it is larger than the sum of its proper divisors (13674611053833).

20423120404215 is a wasteful number, since it uses less digits than its factorization.

20423120404215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59197450478.

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 20423120404215 its reverse (51240402132402), we get a palindrome (71663522536617).

The spelling of 20423120404215 in words is "twenty trillion, four hundred twenty-three billion, one hundred twenty million, four hundred four thousand, two hundred fifteen".