20999834675 has 12 divisors (see below), whose sum is σ = 26048782176. Its totient is φ = 16794069600.

The previous prime is 20999834657. The next prime is 20999834717. The reversal of 20999834675 is 57643899902.

It is a happy number.

It is not a de Polignac number, because 20999834675 - 2⁸ = 20999834419 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70316 + ... + 216665.

It is an arithmetic number, because the mean of its divisors is an integer number (2170731848).

Almost surely, 2^20999834675 is an apocalyptic number.

20999834675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20999834675 is a deficient number, since it is larger than the sum of its proper divisors (5048947501).

20999834675 is a wasteful number, since it uses less digits than its factorization.

20999834675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289918 (or 289913 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 62.

The spelling of 20999834675 in words is "twenty billion, nine hundred ninety-nine million, eight hundred thirty-four thousand, six hundred seventy-five".