20226556011 has 4 divisors (see below), whose sum is σ = 26968741352. Its totient is φ = 13484370672.

The previous prime is 20226555977. The next prime is 20226556027. The reversal of 20226556011 is 11065562202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20226556011 - 2⁷ = 20226555883 is a prime.

It is a super-2 number, since 2×20226556011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20226556011.

It is not an unprimeable number, because it can be changed into a prime (20226556061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3371092666 + ... + 3371092671.

It is an arithmetic number, because the mean of its divisors is an integer number (6742185338).

Almost surely, 2^20226556011 is an apocalyptic number.

20226556011 is a deficient number, since it is larger than the sum of its proper divisors (6742185341).

20226556011 is an equidigital number, since it uses as much as digits as its factorization.

20226556011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6742185340.

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 20226556011 in words is "twenty billion, two hundred twenty-six million, five hundred fifty-six thousand, eleven".