21445476770 has 8 divisors (see below), whose sum is σ = 38601858204. Its totient is φ = 8578190704.

The previous prime is 21445476709. The next prime is 21445476823. The reversal of 21445476770 is 7767454412.

It can be written as a sum of positive squares in 2 ways, for example, as 21285934609 + 159542161 = 145897^2 + 12631^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072273829 + ... + 1072273848.

Almost surely, 2^21445476770 is an apocalyptic number.

21445476770 is a deficient number, since it is larger than the sum of its proper divisors (17156381434).

21445476770 is a wasteful number, since it uses less digits than its factorization.

21445476770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144547684.

The product of its (nonzero) digits is 1317120, while the sum is 47.

The spelling of 21445476770 in words is "twenty-one billion, four hundred forty-five million, four hundred seventy-six thousand, seven hundred seventy".