21531424141326 has 64 divisors (see below), whose sum is σ = 48615619827456. Its totient is φ = 6299870803200.

The previous prime is 21531424141319. The next prime is 21531424141421. The reversal of 21531424141326 is 62314142413512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33333255 + ... + 33973058.

It is an arithmetic number, because the mean of its divisors is an integer number (759619059804).

Almost surely, 2^{21531424141326} is an apocalyptic number.

21531424141326 is an abundant number, since it is smaller than the sum of its proper divisors (27084195686130).

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

21531424141326 is a wasteful number, since it uses less digits than its factorization.

21531424141326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67306497.

The product of its digits is 138240, while the sum is 39.

Adding to 21531424141326 its reverse (62314142413512), we get a palindrome (83845566554838).

The spelling of 21531424141326 in words is "twenty-one trillion, five hundred thirty-one billion, four hundred twenty-four million, one hundred forty-one thousand, three hundred twenty-six".