20043215031 has 16 divisors (see below), whose sum is σ = 31059705600. Its totient is φ = 11259141888.

The previous prime is 20043215011. The next prime is 20043215039. The reversal of 20043215031 is 13051234002.

It is not a de Polignac number, because 20043215031 - 2⁹ = 20043214519 is a prime.

It is a super-2 number, since 2×20043215031² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20043214989 and 20043215007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043215039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8087226 + ... + 8089703.

It is an arithmetic number, because the mean of its divisors is an integer number (1941231600).

Almost surely, 2^20043215031 is an apocalyptic number.

20043215031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20043215031 is a deficient number, since it is larger than the sum of its proper divisors (11016490569).

20043215031 is a wasteful number, since it uses less digits than its factorization.

20043215031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16176998.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 20043215031 its reverse (13051234002), we get a palindrome (33094449033).

The spelling of 20043215031 in words is "twenty billion, forty-three million, two hundred fifteen thousand, thirty-one".