24361981 has 4 divisors (see below), whose sum is σ = 27842272. Its totient is φ = 20881692.

The previous prime is 24361973. The next prime is 24361993. The reversal of 24361981 is 18916342.

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 24361981 - 2³ = 24361973 is a prime.

It is a super-2 number, since 2×24361981² = 1187012236488722, 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 (24361921) 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, 1740135 + ... + 1740148.

It is an arithmetic number, because the mean of its divisors is an integer number (6960568).

Almost surely, 2^24361981 is an apocalyptic number.

It is an amenable number.

24361981 is a deficient number, since it is larger than the sum of its proper divisors (3480291).

24361981 is an equidigital number, since it uses as much as digits as its factorization.

24361981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3480290.

The product of its digits is 10368, while the sum is 34.

The square root of 24361981 is about 4935.7857530488. The cubic root of 24361981 is about 289.8928696644.

The spelling of 24361981 in words is "twenty-four million, three hundred sixty-one thousand, nine hundred eighty-one".