18426938669720 has 32 divisors (see below), whose sum is σ = 47383556580000. Its totient is φ = 6317807543808.

The previous prime is 18426938669641. The next prime is 18426938669747. The reversal of 18426938669720 is 2796683962481.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32905247345 + ... + 32905247904.

It is an arithmetic number, because the mean of its divisors is an integer number (1480736143125).

Almost surely, 2^{18426938669720} is an apocalyptic number.

18426938669720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18426938669720 is an abundant number, since it is smaller than the sum of its proper divisors (28956617910280).

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

18426938669720 is a wasteful number, since it uses less digits than its factorization.

18426938669720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65810495267 (or 65810495263 counting only the distinct ones).

The product of its (nonzero) digits is 376233984, while the sum is 71.

The spelling of 18426938669720 in words is "eighteen trillion, four hundred twenty-six billion, nine hundred thirty-eight million, six hundred sixty-nine thousand, seven hundred twenty".