21285535553034 has 16 divisors (see below), whose sum is σ = 42571449459840. Its totient is φ = 7095115458720.

The previous prime is 21285535552979. The next prime is 21285535553083. The reversal of 21285535553034 is 43035553558212.

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, 15030754 + ... + 16385805.

It is an arithmetic number, because the mean of its divisors is an integer number (2660715591240).

Almost surely, 2^{21285535553034} is an apocalyptic number.

21285535553034 is an abundant number, since it is smaller than the sum of its proper divisors (21285913906806).

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

21285535553034 is a wasteful number, since it uses less digits than its factorization.

21285535553034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31529485.

The product of its (nonzero) digits is 10800000, while the sum is 51.

The spelling of 21285535553034 in words is "twenty-one trillion, two hundred eighty-five billion, five hundred thirty-five million, five hundred fifty-three thousand, thirty-four".