21402222410 has 32 divisors (see below), whose sum is σ = 38700718272. Its totient is φ = 8521666560.

The previous prime is 21402222377. The next prime is 21402222433. The reversal of 21402222410 is 1422220412.

It is a Curzon number.

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, 7202225 + ... + 7205195.

It is an arithmetic number, because the mean of its divisors is an integer number (1209397446).

Almost surely, 2^21402222410 is an apocalyptic number.

21402222410 is a deficient number, since it is larger than the sum of its proper divisors (17298495862).

21402222410 is a wasteful number, since it uses less digits than its factorization.

21402222410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6038.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21402222410 its reverse (1422220412), we get a palindrome (22824442822).

The spelling of 21402222410 in words is "twenty-one billion, four hundred two million, two hundred twenty-two thousand, four hundred ten".