21202424010 has 24 divisors (see below), whose sum is σ = 55126302660. Its totient is φ = 5653979712.

The previous prime is 21202423993. The next prime is 21202424011. The reversal of 21202424010 is 1042420212.

21202424010 is a `hidden beast` number, since 2 + 1 + 20 + 242 + 401 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19895384601 + 1307039409 = 141051^2 + 36153^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21202424011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117791155 + ... + 117791334.

Almost surely, 2^21202424010 is an apocalyptic number.

21202424010 is an abundant number, since it is smaller than the sum of its proper divisors (33923878650).

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

21202424010 is a wasteful number, since it uses less digits than its factorization.

21202424010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235582502 (or 235582499 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21202424010 its reverse (1042420212), we get a palindrome (22244844222).

The spelling of 21202424010 in words is "twenty-one billion, two hundred two million, four hundred twenty-four thousand, ten".