18138952467387 has 24 divisors (see below), whose sum is σ = 26424632832000. Its totient is φ = 11989412633520.

The previous prime is 18138952467331. The next prime is 18138952467401. The reversal of 18138952467387 is 78376425983181.

18138952467387 is a `hidden beast` number, since 1 + 8 + 1 + 3 + 8 + 9 + 524 + 67 + 38 + 7 = 666.

It is not a de Polignac number, because 18138952467387 - 2⁶ = 18138952467323 is a prime.

It is a super-2 number, since 2×18138952467387² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18138952467787) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3580039 + ... + 7006752.

It is an arithmetic number, because the mean of its divisors is an integer number (1101026368000).

Almost surely, 2^{18138952467387} is an apocalyptic number.

18138952467387 is a deficient number, since it is larger than the sum of its proper divisors (8285680364613).

18138952467387 is a wasteful number, since it uses less digits than its factorization.

18138952467387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10588423 (or 10588420 counting only the distinct ones).

The product of its digits is 487710720, while the sum is 72.

The spelling of 18138952467387 in words is "eighteen trillion, one hundred thirty-eight billion, nine hundred fifty-two million, four hundred sixty-seven thousand, three hundred eighty-seven".