20124001 has 4 divisors (see below), whose sum is σ = 20244672. Its totient is φ = 20003332.

The previous prime is 20123959. The next prime is 20124007. The reversal of 20124001 is 10042102.

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 20124001 - 2¹⁵ = 20091233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20124007) 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, 60085 + ... + 60418.

It is an arithmetic number, because the mean of its divisors is an integer number (5061168).

Almost surely, 2^20124001 is an apocalyptic number.

It is an amenable number.

20124001 is a deficient number, since it is larger than the sum of its proper divisors (120671).

20124001 is a wasteful number, since it uses less digits than its factorization.

20124001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120670.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 20124001 is about 4485.9782656629. The cubic root of 20124001 is about 272.0015904247.

Adding to 20124001 its reverse (10042102), we get a palindrome (30166103).

The spelling of 20124001 in words is "twenty million, one hundred twenty-four thousand, one".