21351552465084 has 48 divisors (see below), whose sum is σ = 49866596989440. Its totient is φ = 7110570519360.

The previous prime is 21351552464999. The next prime is 21351552465101. The reversal of 21351552465084 is 48056425515312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99321954 + ... + 99536694.

It is an arithmetic number, because the mean of its divisors is an integer number (1038887437280).

Almost surely, 2^{21351552465084} is an apocalyptic number.

It is an amenable number.

21351552465084 is an abundant number, since it is smaller than the sum of its proper divisors (28515044524356).

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

21351552465084 is a wasteful number, since it uses less digits than its factorization.

21351552465084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222410 (or 222408 counting only the distinct ones).

The product of its (nonzero) digits is 5760000, while the sum is 51.

The spelling of 21351552465084 in words is "twenty-one trillion, three hundred fifty-one billion, five hundred fifty-two million, four hundred sixty-five thousand, eighty-four".