20105014531 has 6 divisors (see below), whose sum is σ = 23387465940. Its totient is φ = 17232869556.

The previous prime is 20105014529. The next prime is 20105014571. The reversal of 20105014531 is 13541050102.

It is a happy number.

It is not a de Polignac number, because 20105014531 - 2¹ = 20105014529 is a prime.

It is a super-2 number, since 2×20105014531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20105014571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 205153161 + ... + 205153258.

It is an arithmetic number, because the mean of its divisors is an integer number (3897910990).

Almost surely, 2^20105014531 is an apocalyptic number.

20105014531 is a deficient number, since it is larger than the sum of its proper divisors (3282451409).

20105014531 is an equidigital number, since it uses as much as digits as its factorization.

20105014531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410306433 (or 410306426 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 20105014531 its reverse (13541050102), we get a palindrome (33646064633).

The spelling of 20105014531 in words is "twenty billion, one hundred five million, fourteen thousand, five hundred thirty-one".