20543421031 has 8 divisors (see below), whose sum is σ = 24235556864. Its totient is φ = 17040625560.

The previous prime is 20543421013. The next prime is 20543421047. The reversal of 20543421031 is 13012434502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20543421031 - 2²⁷ = 20409203303 is a prime.

It is a super-2 number, since 2×20543421031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20543420987 and 20543421005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20543431031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47334855 + ... + 47335288.

It is an arithmetic number, because the mean of its divisors is an integer number (3029444608).

Almost surely, 2^20543421031 is an apocalyptic number.

20543421031 is a deficient number, since it is larger than the sum of its proper divisors (3692135833).

20543421031 is an equidigital number, since it uses as much as digits as its factorization.

20543421031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94670181.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20543421031 its reverse (13012434502), we get a palindrome (33555855533).

The spelling of 20543421031 in words is "twenty billion, five hundred forty-three million, four hundred twenty-one thousand, thirty-one".