18956653536 has 48 divisors (see below), whose sum is σ = 50048896464. Its totient is φ = 6282353664.

The previous prime is 18956653531. The next prime is 18956653537. The reversal of 18956653536 is 63535665981.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18956653531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554101 + ... + 587316.

It is an arithmetic number, because the mean of its divisors is an integer number (1042685343).

Almost surely, 2^18956653536 is an apocalyptic number.

18956653536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18956653536 is an abundant number, since it is smaller than the sum of its proper divisors (31092242928).

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

18956653536 is a wasteful number, since it uses less digits than its factorization.

18956653536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141603 (or 1141595 counting only the distinct ones).

The product of its digits is 17496000, while the sum is 57.

The spelling of 18956653536 in words is "eighteen billion, nine hundred fifty-six million, six hundred fifty-three thousand, five hundred thirty-six".