21055023210 has 32 divisors (see below), whose sum is σ = 54419137920. Its totient is φ = 5182774848.

The previous prime is 21055023173. The next prime is 21055023221. The reversal of 21055023210 is 1232055012.

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, 26993230 + ... + 26994009.

It is an arithmetic number, because the mean of its divisors is an integer number (1700598060).

Almost surely, 2^21055023210 is an apocalyptic number.

21055023210 is an abundant number, since it is smaller than the sum of its proper divisors (33364114710).

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

21055023210 is a wasteful number, since it uses less digits than its factorization.

21055023210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53987262.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 21055023210 its reverse (1232055012), we get a palindrome (22287078222).

The spelling of 21055023210 in words is "twenty-one billion, fifty-five million, twenty-three thousand, two hundred ten".