20355444351 has 12 divisors (see below), whose sum is σ = 32075245800. Its totient is φ = 12336632880.

The previous prime is 20355444341. The next prime is 20355444371. The reversal of 20355444351 is 15344455302.

20355444351 is a `hidden beast` number, since 20 + 3 + 5 + 544 + 43 + 51 = 666.

It is not a de Polignac number, because 20355444351 - 2¹⁸ = 20355182207 is a prime.

It is a super-2 number, since 2×20355444351² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20355444331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102805176 + ... + 102805373.

It is an arithmetic number, because the mean of its divisors is an integer number (2672937150).

Almost surely, 2^20355444351 is an apocalyptic number.

20355444351 is a deficient number, since it is larger than the sum of its proper divisors (11719801449).

20355444351 is a wasteful number, since it uses less digits than its factorization.

20355444351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205610566 (or 205610563 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 20355444351 its reverse (15344455302), we get a palindrome (35699899653).

The spelling of 20355444351 in words is "twenty billion, three hundred fifty-five million, four hundred forty-four thousand, three hundred fifty-one".