18497773037 has 2 divisors, whose sum is σ = 18497773038. Its totient is φ = 18497773036.

The previous prime is 18497773001. The next prime is 18497773079. The reversal of 18497773037 is 73037779481.

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., 15114489481 + 3383283556 = 122941^2 + 58166^2 .

It is a cyclic number.

It is not a de Polignac number, because 18497773037 - 2¹⁸ = 18497510893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18497772037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9248886518 + 9248886519.

It is an arithmetic number, because the mean of its divisors is an integer number (9248886519).

Almost surely, 2^18497773037 is an apocalyptic number.

It is an amenable number.

18497773037 is a deficient number, since it is larger than the sum of its proper divisors (1).

18497773037 is an equidigital number, since it uses as much as digits as its factorization.

18497773037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6223392, while the sum is 56.

The spelling of 18497773037 in words is "eighteen billion, four hundred ninety-seven million, seven hundred seventy-three thousand, thirty-seven".