21532502023534 has 16 divisors (see below), whose sum is σ = 34000360062480. Its totient is φ = 10199104424640.

The previous prime is 21532502023523. The next prime is 21532502023621. The reversal of 21532502023534 is 43532020523512.

It is a junction number, because it is equal to n+sod(n) for n = 21532502023493 and 21532502023502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13155679 + ... + 14701594.

It is an arithmetic number, because the mean of its divisors is an integer number (2125022503905).

Almost surely, 2^{21532502023534} is an apocalyptic number.

21532502023534 is a deficient number, since it is larger than the sum of its proper divisors (12467858038946).

21532502023534 is a wasteful number, since it uses less digits than its factorization.

21532502023534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27877635.

The product of its (nonzero) digits is 216000, while the sum is 37.

The spelling of 21532502023534 in words is "twenty-one trillion, five hundred thirty-two billion, five hundred two million, twenty-three thousand, five hundred thirty-four".