21516235464102 has 32 divisors (see below), whose sum is σ = 43623496097280. Its totient is φ = 7073767253280.

The previous prime is 21516235464079. The next prime is 21516235464103. The reversal of 21516235464102 is 20146453261512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21516235464103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23673468 + ... + 24565535.

It is an arithmetic number, because the mean of its divisors is an integer number (1363234253040).

Almost surely, 2^{21516235464102} is an apocalyptic number.

21516235464102 is an abundant number, since it is smaller than the sum of its proper divisors (22107260633178).

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

21516235464102 is a wasteful number, since it uses less digits than its factorization.

21516235464102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48240028.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 21516235464102 in words is "twenty-one trillion, five hundred sixteen billion, two hundred thirty-five million, four hundred sixty-four thousand, one hundred two".