20351212353 has 24 divisors (see below), whose sum is σ = 30188490696. Its totient is φ = 13203456000.

The previous prime is 20351212339. The next prime is 20351212411. The reversal of 20351212353 is 35321215302.

It is a happy number.

20351212353 is a `hidden beast` number, since 20 + 3 + 512 + 123 + 5 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7521572529 + 12829639824 = 86727^2 + 113268^2 .

It is not a de Polignac number, because 20351212353 - 2⁸ = 20351212097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20351212253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79201 + ... + 216737.

It is an arithmetic number, because the mean of its divisors is an integer number (1257853779).

Almost surely, 2^20351212353 is an apocalyptic number.

It is an amenable number.

20351212353 is a deficient number, since it is larger than the sum of its proper divisors (9837278343).

20351212353 is a wasteful number, since it uses less digits than its factorization.

20351212353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137985 (or 137982 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 20351212353 its reverse (35321215302), we get a palindrome (55672427655).

The spelling of 20351212353 in words is "twenty billion, three hundred fifty-one million, two hundred twelve thousand, three hundred fifty-three".