20357573311 has 4 divisors (see below), whose sum is σ = 20364970752. Its totient is φ = 20350175872.

The previous prime is 20357573273. The next prime is 20357573317. The reversal of 20357573311 is 11337575302.

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

It is a cyclic number.

It is not a de Polignac number, because 20357573311 - 2⁷ = 20357573183 is a prime.

It is a super-2 number, since 2×20357573311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20357573317) 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, 3694591 + ... + 3700096.

It is an arithmetic number, because the mean of its divisors is an integer number (5091242688).

Almost surely, 2^20357573311 is an apocalyptic number.

20357573311 is a deficient number, since it is larger than the sum of its proper divisors (7397441).

20357573311 is an equidigital number, since it uses as much as digits as its factorization.

20357573311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7397440.

The product of its (nonzero) digits is 66150, while the sum is 37.

The spelling of 20357573311 in words is "twenty billion, three hundred fifty-seven million, five hundred seventy-three thousand, three hundred eleven".