21513453052530 has 32 divisors (see below), whose sum is σ = 51700135327488. Its totient is φ = 5729382147200.

The previous prime is 21513453052501. The next prime is 21513453052577. The reversal of 21513453052530 is 3525035431512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471143466 + ... + 471189125.

It is an arithmetic number, because the mean of its divisors is an integer number (1615629228984).

Almost surely, 2^{21513453052530} is an apocalyptic number.

21513453052530 is an abundant number, since it is smaller than the sum of its proper divisors (30186682274958).

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

21513453052530 is a wasteful number, since it uses less digits than its factorization.

21513453052530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942333362.

The product of its (nonzero) digits is 270000, while the sum is 39.

The spelling of 21513453052530 in words is "twenty-one trillion, five hundred thirteen billion, four hundred fifty-three million, fifty-two thousand, five hundred thirty".