20502039087 has 16 divisors (see below), whose sum is σ = 30407902560. Its totient is φ = 13652496000.

The previous prime is 20502039079. The next prime is 20502039097. The reversal of 20502039087 is 78093020502.

It is a happy number.

It is not a de Polignac number, because 20502039087 - 2³ = 20502039079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20502039037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407164 + ... + 454737.

It is an arithmetic number, because the mean of its divisors is an integer number (1900493910).

Almost surely, 2^20502039087 is an apocalyptic number.

20502039087 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20502039087 is a deficient number, since it is larger than the sum of its proper divisors (9905863473).

20502039087 is an equidigital number, since it uses as much as digits as its factorization.

20502039087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862791 (or 862785 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

Adding to 20502039087 its reverse (78093020502), we get a palindrome (98595059589).

The spelling of 20502039087 in words is "twenty billion, five hundred two million, thirty-nine thousand, eighty-seven".