20054389 has 2 divisors, whose sum is σ = 20054390. Its totient is φ = 20054388.

The previous prime is 20054369. The next prime is 20054393. The reversal of 20054389 is 98345002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19873764 + 180625 = 4458^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 20054389 - 2¹¹ = 20052341 is a prime.

It is a super-3 number, since 3×20054389³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20054389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20054369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10027194 + 10027195.

It is an arithmetic number, because the mean of its divisors is an integer number (10027195).

Almost surely, 2^20054389 is an apocalyptic number.

It is an amenable number.

20054389 is a deficient number, since it is larger than the sum of its proper divisors (1).

20054389 is an equidigital number, since it uses as much as digits as its factorization.

20054389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20054389 is about 4478.2127015139. The cubic root of 20054389 is about 271.6875963818.

The spelling of 20054389 in words is "twenty million, fifty-four thousand, three hundred eighty-nine".