21014450552 has 32 divisors (see below), whose sum is σ = 40085020800. Its totient is φ = 10325246304.

The previous prime is 21014450539. The next prime is 21014450563. The reversal of 21014450552 is 25505441012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1554173 + ... + 1567635.

It is an arithmetic number, because the mean of its divisors is an integer number (1252656900).

Almost surely, 2^21014450552 is an apocalyptic number.

It is an amenable number.

21014450552 is a deficient number, since it is larger than the sum of its proper divisors (19070570248).

21014450552 is a wasteful number, since it uses less digits than its factorization.

21014450552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16835 (or 16831 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

Adding to 21014450552 its reverse (25505441012), we get a palindrome (46519891564).

The spelling of 21014450552 in words is "twenty-one billion, fourteen million, four hundred fifty thousand, five hundred fifty-two".