21652406464134 has 8 divisors (see below), whose sum is σ = 43304812928280. Its totient is φ = 7217468821376.

The previous prime is 21652406464093. The next prime is 21652406464153. The reversal of 21652406464134 is 43146460425612.

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

21652406464134 is an admirable number.

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, 1804367205339 + ... + 1804367205350.

It is an arithmetic number, because the mean of its divisors is an integer number (5413101616035).

Almost surely, 2^{21652406464134} is an apocalyptic number.

21652406464134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21652406464134 is a wasteful number, since it uses less digits than its factorization.

21652406464134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3608734410694.

The product of its (nonzero) digits is 3317760, while the sum is 48.

Adding to 21652406464134 its reverse (43146460425612), we get a palindrome (64798866889746).

The spelling of 21652406464134 in words is "twenty-one trillion, six hundred fifty-two billion, four hundred six million, four hundred sixty-four thousand, one hundred thirty-four".