20424001 has 8 divisors (see below), whose sum is σ = 22030400. Its totient is φ = 18822672.

The previous prime is 20423989. The next prime is 20424043. The reversal of 20424001 is 10042402.

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 20424001 - 2⁵ = 20423969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20424101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13900 + ... + 15298.

It is an arithmetic number, because the mean of its divisors is an integer number (2753800).

Almost surely, 2^20424001 is an apocalyptic number.

It is an amenable number.

20424001 is a deficient number, since it is larger than the sum of its proper divisors (1606399).

20424001 is a wasteful number, since it uses less digits than its factorization.

20424001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 20424001 is about 4519.2920905823. The cubic root of 20424001 is about 273.3465567996.

Adding to 20424001 its reverse (10042402), we get a palindrome (30466403).

The spelling of 20424001 in words is "twenty million, four hundred twenty-four thousand, one".