21270875044 has 12 divisors (see below), whose sum is σ = 37642279500. Its totient is φ = 10515938048.

The previous prime is 21270875039. The next prime is 21270875051. The reversal of 21270875044 is 44057807212.

It can be written as a sum of positive squares in 2 ways, for example, as 4510465600 + 16760409444 = 67160^2 + 129462^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21270874988 and 21270875006.

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, 29874469 + ... + 29875180.

It is an arithmetic number, because the mean of its divisors is an integer number (3136856625).

Almost surely, 2^21270875044 is an apocalyptic number.

It is an amenable number.

21270875044 is a deficient number, since it is larger than the sum of its proper divisors (16371404456).

21270875044 is a wasteful number, since it uses less digits than its factorization.

21270875044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59749742 (or 59749740 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 40.

The spelling of 21270875044 in words is "twenty-one billion, two hundred seventy million, eight hundred seventy-five thousand, forty-four".