20087057805 has 8 divisors (see below), whose sum is σ = 32139292512. Its totient is φ = 10713097488.

The previous prime is 20087057803. The next prime is 20087057819. The reversal of 20087057805 is 50875078002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20087057805 - 2¹ = 20087057803 is a prime.

It is a super-2 number, since 2×20087057805² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20087057803) 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, 669568579 + ... + 669568608.

It is an arithmetic number, because the mean of its divisors is an integer number (4017411564).

Almost surely, 2^20087057805 is an apocalyptic number.

It is an amenable number.

20087057805 is a deficient number, since it is larger than the sum of its proper divisors (12052234707).

20087057805 is a wasteful number, since it uses less digits than its factorization.

20087057805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339137195.

The product of its (nonzero) digits is 156800, while the sum is 42.

The spelling of 20087057805 in words is "twenty billion, eighty-seven million, fifty-seven thousand, eight hundred five".