21134243414 has 4 divisors (see below), whose sum is σ = 31701365124. Its totient is φ = 10567121706.

The previous prime is 21134243411. The next prime is 21134243441. The reversal of 21134243414 is 41434243112.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134243411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5283560852 + ... + 5283560855.

It is an arithmetic number, because the mean of its divisors is an integer number (7925341281).

Almost surely, 2^21134243414 is an apocalyptic number.

21134243414 is a deficient number, since it is larger than the sum of its proper divisors (10567121710).

21134243414 is a wasteful number, since it uses less digits than its factorization.

21134243414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10567121709.

The product of its digits is 9216, while the sum is 29.

Adding to 21134243414 its reverse (41434243112), we get a palindrome (62568486526).

The spelling of 21134243414 in words is "twenty-one billion, one hundred thirty-four million, two hundred forty-three thousand, four hundred fourteen".