21150023044438 has 96 divisors (see below), whose sum is σ = 35890787780640. Its totient is φ = 9319000965120.

The previous prime is 21150023044399. The next prime is 21150023044439. The reversal of 21150023044438 is 83444032005112.

It is a super-2 number, since 2×21150023044438² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21150023044397 and 21150023044406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150023044439) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 438036858 + ... + 438085138.

It is an arithmetic number, because the mean of its divisors is an integer number (373862372715).

Almost surely, 2^{21150023044438} is an apocalyptic number.

21150023044438 is a deficient number, since it is larger than the sum of its proper divisors (14740764736202).

21150023044438 is a wasteful number, since it uses less digits than its factorization.

21150023044438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48802 (or 48785 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 21150023044438 in words is "twenty-one trillion, one hundred fifty billion, twenty-three million, forty-four thousand, four hundred thirty-eight".