21431423110 has 16 divisors (see below), whose sum is σ = 39906788400. Its totient is φ = 8276963296.

The previous prime is 21431423089. The next prime is 21431423131. The reversal of 21431423110 is 1132413412.

It is an interprime number because it is at equal distance from previous prime (21431423089) and next prime (21431423131).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36950440 + ... + 36951019.

It is an arithmetic number, because the mean of its divisors is an integer number (2494174275).

Almost surely, 2^21431423110 is an apocalyptic number.

21431423110 is a deficient number, since it is larger than the sum of its proper divisors (18475365290).

21431423110 is a wasteful number, since it uses less digits than its factorization.

21431423110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73901495.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21431423110 its reverse (1132413412), we get a palindrome (22563836522).

The spelling of 21431423110 in words is "twenty-one billion, four hundred thirty-one million, four hundred twenty-three thousand, one hundred ten".