20423445404250 has 192 divisors, whose sum is σ = 59308673119488. Its totient is φ = 4667508316800.

The previous prime is 20423445404231. The next prime is 20423445404267. The reversal of 20423445404250 is 5240454432402.

It is a junction number, because it is equal to n+sod(n) for n = 20423445404199 and 20423445404208.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 265039227 + ... + 265116273.

It is an arithmetic number, because the mean of its divisors is an integer number (308899339164).

Almost surely, 2^{20423445404250} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20423445404250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29654336559744).

20423445404250 is an abundant number, since it is smaller than the sum of its proper divisors (38885227715238).

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

20423445404250 is a wasteful number, since it uses less digits than its factorization.

20423445404250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84294 (or 84277 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 39.

Adding to 20423445404250 its reverse (5240454432402), we get a palindrome (25663899836652).

The spelling of 20423445404250 in words is "twenty trillion, four hundred twenty-three billion, four hundred forty-five million, four hundred four thousand, two hundred fifty".