20071204081 has 4 divisors (see below), whose sum is σ = 20943865152. Its totient is φ = 19198543012.

The previous prime is 20071204067. The next prime is 20071204091. The reversal of 20071204081 is 18040217002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20071204081 - 2²³ = 20062815473 is a prime.

It is a super-2 number, since 2×20071204081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20071204091) 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, 436330501 + ... + 436330546.

It is an arithmetic number, because the mean of its divisors is an integer number (5235966288).

Almost surely, 2^20071204081 is an apocalyptic number.

It is an amenable number.

20071204081 is a deficient number, since it is larger than the sum of its proper divisors (872661071).

20071204081 is an equidigital number, since it uses as much as digits as its factorization.

20071204081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872661070.

The product of its (nonzero) digits is 896, while the sum is 25.

The spelling of 20071204081 in words is "twenty billion, seventy-one million, two hundred four thousand, eighty-one".