21264040110 has 16 divisors (see below), whose sum is σ = 51033696336. Its totient is φ = 5670410688.

The previous prime is 21264040097. The next prime is 21264040117. The reversal of 21264040110 is 1104046212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21264040117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354400639 + ... + 354400698.

It is an arithmetic number, because the mean of its divisors is an integer number (3189606021).

Almost surely, 2^21264040110 is an apocalyptic number.

21264040110 is an abundant number, since it is smaller than the sum of its proper divisors (29769656226).

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

21264040110 is a wasteful number, since it uses less digits than its factorization.

21264040110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708801347.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21264040110 its reverse (1104046212), we get a palindrome (22368086322).

The spelling of 21264040110 in words is "twenty-one billion, two hundred sixty-four million, forty thousand, one hundred ten".