20798357933 has 4 divisors (see below), whose sum is σ = 20857277148. Its totient is φ = 20739438720.

The previous prime is 20798357873. The next prime is 20798357941. The reversal of 20798357933 is 33975389702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12726772969 + 8071584964 = 112813^2 + 89842^2 .

It is a cyclic number.

It is not a de Polignac number, because 20798357933 - 2¹⁴ = 20798341549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20794357933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29459078 + ... + 29459783.

It is an arithmetic number, because the mean of its divisors is an integer number (5214319287).

Almost surely, 2^20798357933 is an apocalyptic number.

It is an amenable number.

20798357933 is a deficient number, since it is larger than the sum of its proper divisors (58919215).

20798357933 is an equidigital number, since it uses as much as digits as its factorization.

20798357933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58919214.

The product of its (nonzero) digits is 8573040, while the sum is 56.

The spelling of 20798357933 in words is "twenty billion, seven hundred ninety-eight million, three hundred fifty-seven thousand, nine hundred thirty-three".