21722454410 has 32 divisors (see below), whose sum is σ = 39754968912. Its totient is φ = 8543623680.

The previous prime is 21722454409. The next prime is 21722454419. The reversal of 21722454410 is 1445422712.

It can be written as a sum of positive squares in 8 ways, for example, as 6105703321 + 15616751089 = 78139^2 + 124967^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21722454419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3007964 + ... + 3015176.

Almost surely, 2^21722454410 is an apocalyptic number.

21722454410 is a deficient number, since it is larger than the sum of its proper divisors (18032514502).

21722454410 is a wasteful number, since it uses less digits than its factorization.

21722454410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12218.

The product of its (nonzero) digits is 17920, while the sum is 32.

The spelling of 21722454410 in words is "twenty-one billion, seven hundred twenty-two million, four hundred fifty-four thousand, four hundred ten".