20314171521 has 30 divisors (see below), whose sum is σ = 35300294370. Its totient is φ = 11608095744.

The previous prime is 20314171489. The next prime is 20314171547. The reversal of 20314171521 is 12517141302.

20314171521 is a `hidden beast` number, since 2 + 0 + 31 + 41 + 71 + 521 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20272064400 + 42107121 = 142380^2 + 6489^2 .

It is not a de Polignac number, because 20314171521 - 2⁵ = 20314171489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20314171321) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2555136 + ... + 2563073.

It is an arithmetic number, because the mean of its divisors is an integer number (1176676479).

Almost surely, 2^20314171521 is an apocalyptic number.

20314171521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20314171521 is a deficient number, since it is larger than the sum of its proper divisors (14986122849).

20314171521 is an equidigital number, since it uses as much as digits as its factorization.

20314171521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5118235 (or 5118219 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The spelling of 20314171521 in words is "twenty billion, three hundred fourteen million, one hundred seventy-one thousand, five hundred twenty-one".