21770102670086 has 4 divisors (see below), whose sum is σ = 32655154005132. Its totient is φ = 10885051335042.

The previous prime is 21770102670079. The next prime is 21770102670097. The reversal of 21770102670086 is 68007620107712.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21770102670086.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5442525667520 + ... + 5442525667523.

It is an arithmetic number, because the mean of its divisors is an integer number (8163788501283).

Almost surely, 2^{21770102670086} is an apocalyptic number.

21770102670086 is a deficient number, since it is larger than the sum of its proper divisors (10885051335046).

21770102670086 is a wasteful number, since it uses less digits than its factorization.

21770102670086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10885051335045.

The product of its (nonzero) digits is 395136, while the sum is 47.

Adding to 21770102670086 its reverse (68007620107712), we get a palindrome (89777722777798).

The spelling of 21770102670086 in words is "twenty-one trillion, seven hundred seventy billion, one hundred two million, six hundred seventy thousand, eighty-six".