20187428586 has 32 divisors (see below), whose sum is σ = 44655773568. Its totient is φ = 6043636800.

The previous prime is 20187428581. The next prime is 20187428663. The reversal of 20187428586 is 68582478102.

It is not an unprimeable number, because it can be changed into a prime (20187428581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3494590 + ... + 3500361.

It is an arithmetic number, because the mean of its divisors is an integer number (1395492924).

Almost surely, 2^20187428586 is an apocalyptic number.

20187428586 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20187428586 is an abundant number, since it is smaller than the sum of its proper divisors (24468344982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20187428586 is a wasteful number, since it uses less digits than its factorization.

20187428586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6995006.

The product of its (nonzero) digits is 1720320, while the sum is 51.

It can be divided in two parts, 201874285 and 86, that added together give a triangular number (201874371 = T₂₀₀₉₃).

The spelling of 20187428586 in words is "twenty billion, one hundred eighty-seven million, four hundred twenty-eight thousand, five hundred eighty-six".