20335221436 has 12 divisors (see below), whose sum is σ = 35594976312. Its totient is φ = 10165228208.

The previous prime is 20335221433. The next prime is 20335221521. The reversal of 20335221436 is 63412253302.

It is a junction number, because it is equal to n+sod(n) for n = 20335221398 and 20335221407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20335221433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576355 + ... + 610618.

It is an arithmetic number, because the mean of its divisors is an integer number (2966248026).

Almost surely, 2^20335221436 is an apocalyptic number.

It is an amenable number.

20335221436 is a deficient number, since it is larger than the sum of its proper divisors (15259754876).

20335221436 is a wasteful number, since it uses less digits than its factorization.

20335221436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191260 (or 1191258 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 20335221436 its reverse (63412253302), we get a palindrome (83747474738).

The spelling of 20335221436 in words is "twenty billion, three hundred thirty-five million, two hundred twenty-one thousand, four hundred thirty-six".