21150023044404 has 48 divisors (see below), whose sum is σ = 53938578710016. Its totient is φ = 6421259366400.

The previous prime is 21150023044399. The next prime is 21150023044439. The reversal of 21150023044404 is 40444032005112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1672196637 + ... + 1672209284.

It is an arithmetic number, because the mean of its divisors is an integer number (1123720389792).

Almost surely, 2^{21150023044404} is an apocalyptic number.

It is an amenable number.

21150023044404 is an abundant number, since it is smaller than the sum of its proper divisors (32788555665612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21150023044404 is a wasteful number, since it uses less digits than its factorization.

21150023044404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3344405976 (or 3344405974 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 21150023044404 its reverse (40444032005112), we get a palindrome (61594055049516).

The spelling of 21150023044404 in words is "twenty-one trillion, one hundred fifty billion, twenty-three million, forty-four thousand, four hundred four".