21038952044 has 24 divisors (see below), whose sum is σ = 40196206848. Its totient is φ = 9555794640.

The previous prime is 21038952017. The next prime is 21038952097. The reversal of 21038952044 is 44025983012.

It is a junction number, because it is equal to n+sod(n) for n = 21038951989 and 21038952007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126152 + ... + 240815.

It is an arithmetic number, because the mean of its divisors is an integer number (1674841952).

Almost surely, 2^21038952044 is an apocalyptic number.

It is an amenable number.

21038952044 is a deficient number, since it is larger than the sum of its proper divisors (19157254804).

21038952044 is a wasteful number, since it uses less digits than its factorization.

21038952044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368285 (or 368283 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 21038952044 in words is "twenty-one billion, thirty-eight million, nine hundred fifty-two thousand, forty-four".