20404143250 has 32 divisors (see below), whose sum is σ = 38240227584. Its totient is φ = 8152326000.

The previous prime is 20404143241. The next prime is 20404143251. The reversal of 20404143250 is 5234140402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (20404143251) 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, 174535 + ... + 266965.

It is an arithmetic number, because the mean of its divisors is an integer number (1195007112).

Almost surely, 2^20404143250 is an apocalyptic number.

20404143250 is a deficient number, since it is larger than the sum of its proper divisors (17836084334).

20404143250 is an equidigital number, since it uses as much as digits as its factorization.

20404143250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93331 (or 93321 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 20404143250 its reverse (5234140402), we get a palindrome (25638283652).

The spelling of 20404143250 in words is "twenty billion, four hundred four million, one hundred forty-three thousand, two hundred fifty".