21143652226 has 8 divisors (see below), whose sum is σ = 31719720060. Its totient is φ = 10570412208.

The previous prime is 21143652217. The next prime is 21143652259. The reversal of 21143652226 is 62225634112.

It can be written as a sum of positive squares in 2 ways, for example, as 20851071201 + 292581025 = 144399^2 + 17105^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21143652191 and 21143652200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688161 + ... + 718228.

Almost surely, 2^21143652226 is an apocalyptic number.

21143652226 is a deficient number, since it is larger than the sum of its proper divisors (10576067834).

21143652226 is a wasteful number, since it uses less digits than its factorization.

21143652226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413908.

The product of its digits is 34560, while the sum is 34.

The spelling of 21143652226 in words is "twenty-one billion, one hundred forty-three million, six hundred fifty-two thousand, two hundred twenty-six".