20014167581 has 8 divisors (see below), whose sum is σ = 20064679128. Its totient is φ = 19963720000.

The previous prime is 20014167571. The next prime is 20014167587. The reversal of 20014167581 is 18576141002.

It can be written as a sum of positive squares in 4 ways, for example, as 4135647481 + 15878520100 = 64309^2 + 126010^2 .

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 20014167581 - 2¹⁴ = 20014151197 is a prime.

It is a super-2 number, since 2×20014167581² (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 (20014167587) 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, 644471 + ... + 674811.

It is an arithmetic number, because the mean of its divisors is an integer number (2508084891).

Almost surely, 2^20014167581 is an apocalyptic number.

It is an amenable number.

20014167581 is a deficient number, since it is larger than the sum of its proper divisors (50511547).

20014167581 is an equidigital number, since it uses as much as digits as its factorization.

20014167581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31983.

The product of its (nonzero) digits is 13440, while the sum is 35.

The spelling of 20014167581 in words is "twenty billion, fourteen million, one hundred sixty-seven thousand, five hundred eighty-one".