21455000532210 has 64 divisors (see below), whose sum is σ = 58897001320704. Its totient is φ = 4899916800000.

The previous prime is 21455000532083. The next prime is 21455000532271. The reversal of 21455000532210 is 1223500055412.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42281791 + ... + 42786210.

It is an arithmetic number, because the mean of its divisors is an integer number (920265645636).

Almost surely, 2^{21455000532210} is an apocalyptic number.

21455000532210 is an abundant number, since it is smaller than the sum of its proper divisors (37442000788494).

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

21455000532210 is a wasteful number, since it uses less digits than its factorization.

21455000532210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85069219.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 21455000532210 its reverse (1223500055412), we get a palindrome (22678500587622).

The spelling of 21455000532210 in words is "twenty-one trillion, four hundred fifty-five billion, five hundred thirty-two thousand, two hundred ten".