21534350214534 has 16 divisors (see below), whose sum is σ = 43357752111600. Its totient is φ = 7129941457760.

The previous prime is 21534350214511. The next prime is 21534350214539. The reversal of 21534350214534 is 43541205343512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21534350214539) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12043819137 + ... + 12043820924.

It is an arithmetic number, because the mean of its divisors is an integer number (2709859506975).

Almost surely, 2^{21534350214534} is an apocalyptic number.

21534350214534 is an abundant number, since it is smaller than the sum of its proper divisors (21823401897066).

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

21534350214534 is a wasteful number, since it uses less digits than its factorization.

21534350214534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24087640215.

The product of its (nonzero) digits is 864000, while the sum is 42.

The spelling of 21534350214534 in words is "twenty-one trillion, five hundred thirty-four billion, three hundred fifty million, two hundred fourteen thousand, five hundred thirty-four".