20315665353 has 32 divisors (see below), whose sum is σ = 28631554560. Its totient is φ = 12798627840.

The previous prime is 20315665351. The next prime is 20315665379. The reversal of 20315665353 is 35356651302.

It is not a de Polignac number, because 20315665353 - 2¹ = 20315665351 is a prime.

It is a super-2 number, since 2×20315665353² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20315665351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 542643 + ... + 578871.

It is an arithmetic number, because the mean of its divisors is an integer number (894736080).

Almost surely, 2^20315665353 is an apocalyptic number.

It is an amenable number.

20315665353 is a deficient number, since it is larger than the sum of its proper divisors (8315889207).

20315665353 is a wasteful number, since it uses less digits than its factorization.

20315665353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36417.

The product of its (nonzero) digits is 243000, while the sum is 39.

The spelling of 20315665353 in words is "twenty billion, three hundred fifteen million, six hundred sixty-five thousand, three hundred fifty-three".