20041220031 has 32 divisors (see below), whose sum is σ = 31313668608. Its totient is φ = 11164383360.

The previous prime is 20041220009. The next prime is 20041220033. The reversal of 20041220031 is 13002214002.

It is not a de Polignac number, because 20041220031 - 2⁵ = 20041219999 is a prime.

It is a super-2 number, since 2×20041220031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20041220033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117396 + ... + 232086.

It is an arithmetic number, because the mean of its divisors is an integer number (978552144).

Almost surely, 2^20041220031 is an apocalyptic number.

20041220031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20041220031 is a deficient number, since it is larger than the sum of its proper divisors (11272448577).

20041220031 is a wasteful number, since it uses less digits than its factorization.

20041220031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114911.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20041220031 its reverse (13002214002), we get a palindrome (33043434033).

The spelling of 20041220031 in words is "twenty billion, forty-one million, two hundred twenty thousand, thirty-one".