20215642226 has 8 divisors (see below), whose sum is σ = 32656037484. Its totient is φ = 9330296400.

The previous prime is 20215642189. The next prime is 20215642243. The reversal of 20215642226 is 62224651202.

It can be written as a sum of positive squares in 2 ways, for example, as 17146593025 + 3069049201 = 130945^2 + 55399^2 .

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 = 20215642192 and 20215642201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388762325 + ... + 388762376.

Almost surely, 2^20215642226 is an apocalyptic number.

20215642226 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20215642226 is a deficient number, since it is larger than the sum of its proper divisors (12440395258).

20215642226 is a wasteful number, since it uses less digits than its factorization.

20215642226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777524716.

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 20215642226 in words is "twenty billion, two hundred fifteen million, six hundred forty-two thousand, two hundred twenty-six".