21434005655252 has 96 divisors (see below), whose sum is σ = 39065938329600. Its totient is φ = 10283828757120.

The previous prime is 21434005655239. The next prime is 21434005655273. The reversal of 21434005655252 is 25255650043412.

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 31 ways as a sum of consecutive naturals, for example, 897296453 + ... + 897320339.

It is an arithmetic number, because the mean of its divisors is an integer number (406936857600).

Almost surely, 2^{21434005655252} is an apocalyptic number.

It is an amenable number.

21434005655252 is a deficient number, since it is larger than the sum of its proper divisors (17631932674348).

21434005655252 is a wasteful number, since it uses less digits than its factorization.

21434005655252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24501 (or 24499 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 44.

Adding to 21434005655252 its reverse (25255650043412), we get a palindrome (46689655698664).

The spelling of 21434005655252 in words is "twenty-one trillion, four hundred thirty-four billion, five million, six hundred fifty-five thousand, two hundred fifty-two".