21152520644134 has 8 divisors (see below), whose sum is σ = 34613215599528. Its totient is φ = 9614782110960.

The previous prime is 21152520644113. The next prime is 21152520644149. The reversal of 21152520644134 is 43144602525112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480739105527 + ... + 480739105570.

It is an arithmetic number, because the mean of its divisors is an integer number (4326651949941).

Almost surely, 2^{21152520644134} is an apocalyptic number.

21152520644134 is a deficient number, since it is larger than the sum of its proper divisors (13460694955394).

21152520644134 is a wasteful number, since it uses less digits than its factorization.

21152520644134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961478211110.

The product of its (nonzero) digits is 230400, while the sum is 40.

The spelling of 21152520644134 in words is "twenty-one trillion, one hundred fifty-two billion, five hundred twenty million, six hundred forty-four thousand, one hundred thirty-four".