23747005381 has 4 divisors (see below), whose sum is σ = 25905824064. Its totient is φ = 21588186700.

The previous prime is 23747005357. The next prime is 23747005427. The reversal of 23747005381 is 18350074732.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23747005381 - 2⁷ = 23747005253 is a prime.

It is a super-2 number, since 2×23747005381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23747008381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1079409325 + ... + 1079409346.

It is an arithmetic number, because the mean of its divisors is an integer number (6476456016).

Almost surely, 2^23747005381 is an apocalyptic number.

It is an amenable number.

23747005381 is a deficient number, since it is larger than the sum of its proper divisors (2158818683).

23747005381 is a wasteful number, since it uses less digits than its factorization.

23747005381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158818682.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 23747005381 in words is "twenty-three billion, seven hundred forty-seven million, five thousand, three hundred eighty-one".