20553523226 has 8 divisors (see below), whose sum is σ = 32643831060. Its totient is φ = 9672246208.

The previous prime is 20553523213. The next prime is 20553523231. The reversal of 20553523226 is 62232535502.

It is a Cunningham number, because it is equal to 143365²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 20553523225 + 1 = 143365^2 + 1^2 .

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

It is a super-3 number, since 3×20553523226³ (a number of 32 digits) contains 333 as substring.

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, 302257661 + ... + 302257728.

Almost surely, 2^20553523226 is an apocalyptic number.

20553523226 is a deficient number, since it is larger than the sum of its proper divisors (12090307834).

20553523226 is a wasteful number, since it uses less digits than its factorization.

20553523226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604515408.

The product of its (nonzero) digits is 108000, while the sum is 35.

The spelling of 20553523226 in words is "twenty billion, five hundred fifty-three million, five hundred twenty-three thousand, two hundred twenty-six".