20212554433 has 4 divisors (see below), whose sum is σ = 20269814148. Its totient is φ = 20155294720.

The previous prime is 20212554409. The next prime is 20212554451. The reversal of 20212554433 is 33445521202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5331482289 + 14881072144 = 73017^2 + 121988^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212554433 - 2²⁵ = 20179000001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212554395 and 20212554404.

It is not an unprimeable number, because it can be changed into a prime (20212554463) 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, 28629328 + ... + 28630033.

It is an arithmetic number, because the mean of its divisors is an integer number (5067453537).

Almost surely, 2^20212554433 is an apocalyptic number.

It is an amenable number.

20212554433 is a deficient number, since it is larger than the sum of its proper divisors (57259715).

20212554433 is an equidigital number, since it uses as much as digits as its factorization.

20212554433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57259714.

The product of its (nonzero) digits is 28800, while the sum is 31.

The spelling of 20212554433 in words is "twenty billion, two hundred twelve million, five hundred fifty-four thousand, four hundred thirty-three".