21140404422 has 32 divisors (see below), whose sum is σ = 42546746880. Its totient is φ = 7002534240.

The previous prime is 21140404409. The next prime is 21140404457. The reversal of 21140404422 is 22440404112.

It is a junction number, because it is equal to n+sod(n) for n = 21140404392 and 21140404401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1734883 + ... + 1747025.

It is an arithmetic number, because the mean of its divisors is an integer number (1329585840).

Almost surely, 2^21140404422 is an apocalyptic number.

21140404422 is an abundant number, since it is smaller than the sum of its proper divisors (21406342458).

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

21140404422 is a wasteful number, since it uses less digits than its factorization.

21140404422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13948.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 21140404422 its reverse (22440404112), we get a palindrome (43580808534).

The spelling of 21140404422 in words is "twenty-one billion, one hundred forty million, four hundred four thousand, four hundred twenty-two".