20424002031 has 12 divisors (see below), whose sum is σ = 30220881600. Its totient is φ = 13283903520.

The previous prime is 20424002021. The next prime is 20424002033. The reversal of 20424002031 is 13020042402.

20424002031 is a `hidden beast` number, since 20 + 42 + 400 + 203 + 1 = 666.

It is not a de Polignac number, because 20424002031 - 2¹¹ = 20423999983 is a prime.

It is a super-2 number, since 2×20424002031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20424001995 and 20424002013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424002033) 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 11 ways as a sum of consecutive naturals, for example, 27674431 + ... + 27675168.

It is an arithmetic number, because the mean of its divisors is an integer number (2518406800).

Almost surely, 2^20424002031 is an apocalyptic number.

20424002031 is a deficient number, since it is larger than the sum of its proper divisors (9796879569).

20424002031 is a wasteful number, since it uses less digits than its factorization.

20424002031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55349646 (or 55349643 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20424002031 its reverse (13020042402), we get a palindrome (33444044433).

The spelling of 20424002031 in words is "twenty billion, four hundred twenty-four million, two thousand, thirty-one".