21110555032 has 16 divisors (see below), whose sum is σ = 45236903760. Its totient is φ = 9047380704.

The previous prime is 21110554987. The next prime is 21110555051. The reversal of 21110555032 is 23055501112.

It is a junction number, because it is equal to n+sod(n) for n = 21110554988 and 21110555006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188487043 + ... + 188487154.

It is an arithmetic number, because the mean of its divisors is an integer number (2827306485).

Almost surely, 2^21110555032 is an apocalyptic number.

It is an amenable number.

21110555032 is an abundant number, since it is smaller than the sum of its proper divisors (24126348728).

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

21110555032 is a wasteful number, since it uses less digits than its factorization.

21110555032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376974210 (or 376974206 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The spelling of 21110555032 in words is "twenty-one billion, one hundred ten million, five hundred fifty-five thousand, thirty-two".