20554697 has 2 divisors, whose sum is σ = 20554698. Its totient is φ = 20554696.

The previous prime is 20554687. The next prime is 20554747. The reversal of 20554697 is 79645502.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19324816 + 1229881 = 4396^2 + 1109^2 .

It is a cyclic number.

It is not a de Polignac number, because 20554697 - 2⁸ = 20554441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20554697.

It is not a weakly prime, because it can be changed into another prime (20554627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10277348 + 10277349.

It is an arithmetic number, because the mean of its divisors is an integer number (10277349).

Almost surely, 2^20554697 is an apocalyptic number.

It is an amenable number.

20554697 is a deficient number, since it is larger than the sum of its proper divisors (1).

20554697 is an equidigital number, since it uses as much as digits as its factorization.

20554697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 20554697 is about 4533.7288185334. The cubic root of 20554697 is about 273.9283782824.

The spelling of 20554697 in words is "twenty million, five hundred fifty-four thousand, six hundred ninety-seven".