18955743072 has 96 divisors (see below), whose sum is σ = 59860281600. Its totient is φ = 5130874368.

The previous prime is 18955743071. The next prime is 18955743119. The reversal of 18955743072 is 27034755981.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18955743071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 729547 + ... + 755082.

It is an arithmetic number, because the mean of its divisors is an integer number (623544600).

Almost surely, 2^18955743072 is an apocalyptic number.

18955743072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18955743072 is an abundant number, since it is smaller than the sum of its proper divisors (40904538528).

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

18955743072 is a wasteful number, since it uses less digits than its factorization.

18955743072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484668 (or 1484660 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 51.

The spelling of 18955743072 in words is "eighteen billion, nine hundred fifty-five million, seven hundred forty-three thousand, seventy-two".