20554672097 has 2 divisors, whose sum is σ = 20554672098. Its totient is φ = 20554672096.

The previous prime is 20554672091. The next prime is 20554672139. The reversal of 20554672097 is 79027645502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20554670161 + 1936 = 143369^2 + 44^2 .

It is a cyclic number.

It is not a de Polignac number, because 20554672097 - 2³⁴ = 3374802913 is a prime.

It is not a weakly prime, because it can be changed into another prime (20554672091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10277336048 + 10277336049.

It is an arithmetic number, because the mean of its divisors is an integer number (10277336049).

Almost surely, 2^20554672097 is an apocalyptic number.

It is an amenable number.

20554672097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20554672097 is an equidigital number, since it uses as much as digits as its factorization.

20554672097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 20554672097 in words is "twenty billion, five hundred fifty-four million, six hundred seventy-two thousand, ninety-seven".