20312684353 has 16 divisors (see below), whose sum is σ = 22630482000. Its totient is φ = 18110186496.

The previous prime is 20312684351. The next prime is 20312684363. The reversal of 20312684353 is 35348621302.

It can be written as a sum of positive squares in 8 ways, for example, as 595750464 + 19716933889 = 24408^2 + 140417^2 .

It is a cyclic number.

It is not a de Polignac number, because 20312684353 - 2¹ = 20312684351 is a prime.

It is a super-2 number, since 2×20312684353² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (20312684351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88228 + ... + 220021.

It is an arithmetic number, because the mean of its divisors is an integer number (1414405125).

Almost surely, 2^20312684353 is an apocalyptic number.

It is an amenable number.

20312684353 is a deficient number, since it is larger than the sum of its proper divisors (2317797647).

20312684353 is a wasteful number, since it uses less digits than its factorization.

20312684353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308436.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 20312684353 in words is "twenty billion, three hundred twelve million, six hundred eighty-four thousand, three hundred fifty-three".