21431442414 has 16 divisors (see below), whose sum is σ = 43671619152. Its totient is φ = 7009025088.

The previous prime is 21431442359. The next prime is 21431442451. The reversal of 21431442414 is 41424413412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33696919 + ... + 33697554.

It is an arithmetic number, because the mean of its divisors is an integer number (2729476197).

Almost surely, 2^21431442414 is an apocalyptic number.

21431442414 is an abundant number, since it is smaller than the sum of its proper divisors (22240176738).

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

21431442414 is a wasteful number, since it uses less digits than its factorization.

21431442414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67394531.

The product of its digits is 12288, while the sum is 30.

Adding to 21431442414 its reverse (41424413412), we get a palindrome (62855855826).

The spelling of 21431442414 in words is "twenty-one billion, four hundred thirty-one million, four hundred forty-two thousand, four hundred fourteen".