20351835369 has 6 divisors (see below), whose sum is σ = 29397095546. Its totient is φ = 13567890240.

The previous prime is 20351835367. The next prime is 20351835401. The reversal of 20351835369 is 96353815302.

It is a happy number.

20351835369 is a `hidden beast` number, since 2 + 0 + 35 + 1 + 83 + 536 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13981880025 + 6369955344 = 118245^2 + 79812^2 .

It is not a de Polignac number, because 20351835369 - 2¹ = 20351835367 is a prime.

It is a super-2 number, since 2×20351835369² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20351835367) 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 5 ways as a sum of consecutive naturals, for example, 1130657512 + ... + 1130657529.

Almost surely, 2^20351835369 is an apocalyptic number.

It is an amenable number.

20351835369 is a deficient number, since it is larger than the sum of its proper divisors (9045260177).

20351835369 is a wasteful number, since it uses less digits than its factorization.

20351835369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261315047 (or 2261315044 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 20351835369 in words is "twenty billion, three hundred fifty-one million, eight hundred thirty-five thousand, three hundred sixty-nine".