18649722036 has 48 divisors (see below), whose sum is σ = 47481090048. Its totient is φ = 5650351200.

The previous prime is 18649722019. The next prime is 18649722037. The reversal of 18649722036 is 63022794681.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18649722037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 927651 + ... + 947541.

It is an arithmetic number, because the mean of its divisors is an integer number (989189376).

Almost surely, 2^18649722036 is an apocalyptic number.

It is an amenable number.

18649722036 is an abundant number, since it is smaller than the sum of its proper divisors (28831368012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18649722036 is a wasteful number, since it uses less digits than its factorization.

18649722036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27012 (or 27010 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 18649722036 in words is "eighteen billion, six hundred forty-nine million, seven hundred twenty-two thousand, thirty-six".