20086021537 has 4 divisors (see below), whose sum is σ = 20426462640. Its totient is φ = 19745580436.

The previous prime is 20086021519. The next prime is 20086021573. The reversal of 20086021537 is 73512068002.

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 20086021537 - 2¹¹ = 20086019489 is a prime.

It is a super-2 number, since 2×20086021537² (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 (20086021507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170220463 + ... + 170220580.

It is an arithmetic number, because the mean of its divisors is an integer number (5106615660).

Almost surely, 2^20086021537 is an apocalyptic number.

It is an amenable number.

20086021537 is a deficient number, since it is larger than the sum of its proper divisors (340441103).

20086021537 is an equidigital number, since it uses as much as digits as its factorization.

20086021537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340441102.

The product of its (nonzero) digits is 20160, while the sum is 34.

Adding to 20086021537 its reverse (73512068002), we get a palindrome (93598089539).

The spelling of 20086021537 in words is "twenty billion, eighty-six million, twenty-one thousand, five hundred thirty-seven".