20963209435 has 16 divisors (see below), whose sum is σ = 28851146496. Its totient is φ = 14323971168.

The previous prime is 20963209427. The next prime is 20963209471. The reversal of 20963209435 is 53490236902.

It is a cyclic number.

It is not a de Polignac number, because 20963209435 - 2³ = 20963209427 is a prime.

It is a super-2 number, since 2×20963209435² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20963209391 and 20963209400.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1048309 + ... + 1068118.

It is an arithmetic number, because the mean of its divisors is an integer number (1803196656).

Almost surely, 2^20963209435 is an apocalyptic number.

20963209435 is a deficient number, since it is larger than the sum of its proper divisors (7887937061).

20963209435 is a wasteful number, since it uses less digits than its factorization.

20963209435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116722.

The product of its (nonzero) digits is 349920, while the sum is 43.

The spelling of 20963209435 in words is "twenty billion, nine hundred sixty-three million, two hundred nine thousand, four hundred thirty-five".