21070766146 has 8 divisors (see below), whose sum is σ = 31606869564. Its totient is φ = 10535142960.

The previous prime is 21070766137. The next prime is 21070766177. The reversal of 21070766146 is 64166707012.

It can be written as a sum of positive squares in 2 ways, for example, as 15316785121 + 5753981025 = 123761^2 + 75855^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21070766099 and 21070766108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24396 + ... + 206728.

Almost surely, 2^21070766146 is an apocalyptic number.

21070766146 is a deficient number, since it is larger than the sum of its proper divisors (10536103418).

21070766146 is a wasteful number, since it uses less digits than its factorization.

21070766146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240116.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 21070766146 in words is "twenty-one billion, seventy million, seven hundred sixty-six thousand, one hundred forty-six".