24139381 has 8 divisors (see below), whose sum is σ = 27898560. Its totient is φ = 20457888.

The previous prime is 24139369. The next prime is 24139387. The reversal of 24139381 is 18393142.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 24139381 - 2²³ = 15750773 is a prime.

It is a super-2 number, since 2×24139381² = 1165419430126322, which 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 (24139387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18751 + ... + 19996.

It is an arithmetic number, because the mean of its divisors is an integer number (3487320).

Almost surely, 2^24139381 is an apocalyptic number.

It is an amenable number.

24139381 is a deficient number, since it is larger than the sum of its proper divisors (3759179).

24139381 is an equidigital number, since it uses as much as digits as its factorization.

24139381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38843.

The product of its digits is 5184, while the sum is 31.

The square root of 24139381 is about 4913.1844052508. The cubic root of 24139381 is about 289.0072315332.

The spelling of 24139381 in words is "twenty-four million, one hundred thirty-nine thousand, three hundred eighty-one".