74118021 has 4 divisors (see below), whose sum is σ = 98824032. Its totient is φ = 49412012.

The previous prime is 74118017. The next prime is 74118059. The reversal of 74118021 is 12081147.

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 74118021 - 2² = 74118017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74117982 and 74118000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74118061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12353001 + ... + 12353006.

It is an arithmetic number, because the mean of its divisors is an integer number (24706008).

Almost surely, 2^74118021 is an apocalyptic number.

It is an amenable number.

74118021 is a deficient number, since it is larger than the sum of its proper divisors (24706011).

74118021 is a wasteful number, since it uses less digits than its factorization.

74118021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24706010.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 74118021 is about 8609.1823653585. The cubic root of 74118021 is about 420.0567213643.

Adding to 74118021 its reverse (12081147), we get a palindrome (86199168).

The spelling of 74118021 in words is "seventy-four million, one hundred eighteen thousand, twenty-one".