20404211243 has 16 divisors (see below), whose sum is σ = 22035888000. Its totient is φ = 18781501440.

The previous prime is 20404211227. The next prime is 20404211281. The reversal of 20404211243 is 34211240402.

It is not a de Polignac number, because 20404211243 - 2⁴ = 20404211227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20404211143) 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, 9803963 + ... + 9806043.

It is an arithmetic number, because the mean of its divisors is an integer number (1377243000).

Almost surely, 2^20404211243 is an apocalyptic number.

20404211243 is a deficient number, since it is larger than the sum of its proper divisors (1631676757).

20404211243 is a wasteful number, since it uses less digits than its factorization.

20404211243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3862.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 20404211243 its reverse (34211240402), we get a palindrome (54615451645).

The spelling of 20404211243 in words is "twenty billion, four hundred four million, two hundred eleven thousand, two hundred forty-three".