20424315 has 16 divisors (see below), whose sum is σ = 32755968. Its totient is φ = 10867296.

The previous prime is 20424307. The next prime is 20424329. The reversal of 20424315 is 51342402.

It is not a de Polignac number, because 20424315 - 2³ = 20424307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20424291 and 20424300.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6192 + ... + 8898.

It is an arithmetic number, because the mean of its divisors is an integer number (2047248).

Almost surely, 2^20424315 is an apocalyptic number.

20424315 is a deficient number, since it is larger than the sum of its proper divisors (12331653).

20424315 is a wasteful number, since it uses less digits than its factorization.

20424315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20424315 is about 4519.3268304030. The cubic root of 20424315 is about 273.3479576087.

Adding to 20424315 its reverse (51342402), we get a palindrome (71766717).

The spelling of 20424315 in words is "twenty million, four hundred twenty-four thousand, three hundred fifteen".