20271445019 has 4 divisors (see below), whose sum is σ = 23167365744. Its totient is φ = 17375524296.

The previous prime is 20271445013. The next prime is 20271445039. The reversal of 20271445019 is 91054417202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20271445019 - 2¹² = 20271440923 is a prime.

It is a super-2 number, since 2×20271445019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20271445019.

It is not an unprimeable number, because it can be changed into a prime (20271445013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1447960352 + ... + 1447960365.

It is an arithmetic number, because the mean of its divisors is an integer number (5791841436).

Almost surely, 2^20271445019 is an apocalyptic number.

20271445019 is a deficient number, since it is larger than the sum of its proper divisors (2895920725).

20271445019 is an equidigital number, since it uses as much as digits as its factorization.

20271445019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895920724.

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 20271445019 in words is "twenty billion, two hundred seventy-one million, four hundred forty-five thousand, nineteen".