21404331022 has 16 divisors (see below), whose sum is σ = 34259279760. Its totient is φ = 10000003392.

The previous prime is 21404330993. The next prime is 21404331023. The reversal of 21404331022 is 22013340412.

It is a junction number, because it is equal to n+sod(n) for n = 21404330984 and 21404331002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404331023) 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, 3855253 + ... + 3860800.

It is an arithmetic number, because the mean of its divisors is an integer number (2141204985).

Almost surely, 2^21404331022 is an apocalyptic number.

21404331022 is a deficient number, since it is larger than the sum of its proper divisors (12854948738).

21404331022 is a wasteful number, since it uses less digits than its factorization.

21404331022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7716147.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21404331022 its reverse (22013340412), we get a palindrome (43417671434).

The spelling of 21404331022 in words is "twenty-one billion, four hundred four million, three hundred thirty-one thousand, twenty-two".