20357531773 has 8 divisors (see below), whose sum is σ = 21647548728. Its totient is φ = 19077794304.

The previous prime is 20357531759. The next prime is 20357531791. The reversal of 20357531773 is 37713575302.

It can be written as a sum of positive squares in 4 ways, for example, as 2023830169 + 18333701604 = 44987^2 + 135402^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20357531773 - 2¹³ = 20357523581 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 (20357531743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2565786 + ... + 2573707.

It is an arithmetic number, because the mean of its divisors is an integer number (2705943591).

Almost surely, 2^20357531773 is an apocalyptic number.

It is an amenable number.

20357531773 is a deficient number, since it is larger than the sum of its proper divisors (1290016955).

20357531773 is a wasteful number, since it uses less digits than its factorization.

20357531773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5139743.

The product of its (nonzero) digits is 463050, while the sum is 43.

The spelling of 20357531773 in words is "twenty billion, three hundred fifty-seven million, five hundred thirty-one thousand, seven hundred seventy-three".