20004200031 has 4 divisors (see below), whose sum is σ = 26672266712. Its totient is φ = 13336133352.

The previous prime is 20004200023. The next prime is 20004200057. The reversal of 20004200031 is 13000240002.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20004200031 - 2³ = 20004200023 is a prime.

It is a super-2 number, since 2×20004200031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004200071) 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, 3334033336 + ... + 3334033341.

It is an arithmetic number, because the mean of its divisors is an integer number (6668066678).

Almost surely, 2^20004200031 is an apocalyptic number.

20004200031 is a deficient number, since it is larger than the sum of its proper divisors (6668066681).

20004200031 is an equidigital number, since it uses as much as digits as its factorization.

20004200031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6668066680.

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 20004200031 its reverse (13000240002), we get a palindrome (33004440033).

The spelling of 20004200031 in words is "twenty billion, four million, two hundred thousand, thirty-one".