23667381381 has 16 divisors (see below), whose sum is σ = 36179813504. Its totient is φ = 13481005824.

The previous prime is 23667381379. The next prime is 23667381401. The reversal of 23667381381 is 18318376632.

It is not a de Polignac number, because 23667381381 - 2¹ = 23667381379 is a prime.

It is a super-2 number, since 2×23667381381² (a number of 22 digits) contains 22 as substring.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23667381381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23667381581) 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, 1793776 + ... + 1806921.

It is an arithmetic number, because the mean of its divisors is an integer number (2261238344).

Almost surely, 2^23667381381 is an apocalyptic number.

23667381381 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23667381381 is a deficient number, since it is larger than the sum of its proper divisors (12512432123).

23667381381 is a wasteful number, since it uses less digits than its factorization.

23667381381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601020.

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

The spelling of 23667381381 in words is "twenty-three billion, six hundred sixty-seven million, three hundred eighty-one thousand, three hundred eighty-one".