21860071075 has 24 divisors (see below), whose sum is σ = 27532586016. Its totient is φ = 17213952000.

The previous prime is 21860071067. The next prime is 21860071087. The reversal of 21860071075 is 57017006812.

It is not a de Polignac number, because 21860071075 - 2³ = 21860071067 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1128169 + ... + 1147381.

It is an arithmetic number, because the mean of its divisors is an integer number (1147191084).

Almost surely, 2^21860071075 is an apocalyptic number.

21860071075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21860071075 is a deficient number, since it is larger than the sum of its proper divisors (5672514941).

21860071075 is a wasteful number, since it uses less digits than its factorization.

21860071075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19935 (or 19930 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 37.

Adding to 21860071075 its reverse (57017006812), we get a palindrome (78877077887).

The spelling of 21860071075 in words is "twenty-one billion, eight hundred sixty million, seventy-one thousand, seventy-five".