21114431030 has 96 divisors (see below), whose sum is σ = 47829821760. Its totient is φ = 6569164800.

The previous prime is 21114431029. The next prime is 21114431071. The reversal of 21114431030 is 3013441112.

It is a junction number, because it is equal to n+sod(n) for n = 21114430993 and 21114431011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5427326 + ... + 5431214.

It is an arithmetic number, because the mean of its divisors is an integer number (498227310).

Almost surely, 2^21114431030 is an apocalyptic number.

21114431030 is an abundant number, since it is smaller than the sum of its proper divisors (26715390730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21114431030 is a wasteful number, since it uses less digits than its factorization.

21114431030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4566 (or 4555 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21114431030 its reverse (3013441112), we get a palindrome (24127872142).

The spelling of 21114431030 in words is "twenty-one billion, one hundred fourteen million, four hundred thirty-one thousand, thirty".