18802639061 has 2 divisors, whose sum is σ = 18802639062. Its totient is φ = 18802639060.

The previous prime is 18802638973. The next prime is 18802639091. The reversal of 18802639061 is 16093620881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15818092900 + 2984546161 = 125770^2 + 54631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18802639061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18802639091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9401319530 + 9401319531.

It is an arithmetic number, because the mean of its divisors is an integer number (9401319531).

Almost surely, 2^18802639061 is an apocalyptic number.

It is an amenable number.

18802639061 is a deficient number, since it is larger than the sum of its proper divisors (1).

18802639061 is an equidigital number, since it uses as much as digits as its factorization.

18802639061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 18802639061 in words is "eighteen billion, eight hundred two million, six hundred thirty-nine thousand, sixty-one".