21860071076 has 6 divisors (see below), whose sum is σ = 38255124390. Its totient is φ = 10930035536.

The previous prime is 21860071067. The next prime is 21860071087. The reversal of 21860071076 is 67017006812.

It can be written as a sum of positive squares in only one way, i.e., 21177816676 + 682254400 = 145526^2 + 26120^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2732508881 + ... + 2732508888.

It is an arithmetic number, because the mean of its divisors is an integer number (6375854065).

Almost surely, 2^21860071076 is an apocalyptic number.

It is an amenable number.

21860071076 is a deficient number, since it is larger than the sum of its proper divisors (16395053314).

21860071076 is a wasteful number, since it uses less digits than its factorization.

21860071076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5465017773 (or 5465017771 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

Adding to 21860071076 its reverse (67017006812), we get a palindrome (88877077888).

The spelling of 21860071076 in words is "twenty-one billion, eight hundred sixty million, seventy-one thousand, seventy-six".