20548869443 has 2 divisors, whose sum is σ = 20548869444. Its totient is φ = 20548869442.

The previous prime is 20548869421. The next prime is 20548869449. The reversal of 20548869443 is 34496884502.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20548869443 - 2¹⁰ = 20548868419 is a prime.

It is not a weakly prime, because it can be changed into another prime (20548869449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10274434721 + 10274434722.

It is an arithmetic number, because the mean of its divisors is an integer number (10274434722).

Almost surely, 2^20548869443 is an apocalyptic number.

20548869443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20548869443 is an equidigital number, since it uses as much as digits as its factorization.

20548869443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6635520, while the sum is 53.

The spelling of 20548869443 in words is "twenty billion, five hundred forty-eight million, eight hundred sixty-nine thousand, four hundred forty-three".