18273770273047 has 2 divisors, whose sum is σ = 18273770273048. Its totient is φ = 18273770273046.

The previous prime is 18273770272957. The next prime is 18273770273081. The reversal of 18273770273047 is 74037207737281.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18273770273047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18273770272982 and 18273770273000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18273770273147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9136885136523 + 9136885136524.

It is an arithmetic number, because the mean of its divisors is an integer number (9136885136524).

Almost surely, 2^{18273770273047} is an apocalyptic number.

18273770273047 is a deficient number, since it is larger than the sum of its proper divisors (1).

18273770273047 is an equidigital number, since it uses as much as digits as its factorization.

18273770273047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19361664, while the sum is 58.

The spelling of 18273770273047 in words is "eighteen trillion, two hundred seventy-three billion, seven hundred seventy million, two hundred seventy-three thousand, forty-seven".