21055131032 has 16 divisors (see below), whose sum is σ = 42515168640. Its totient is φ = 9717752736.

The previous prime is 21055130983. The next prime is 21055131059. The reversal of 21055131032 is 23013155012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21055130989 and 21055131007.

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, 101226488 + ... + 101226695.

It is an arithmetic number, because the mean of its divisors is an integer number (2657198040).

Almost surely, 2^21055131032 is an apocalyptic number.

It is an amenable number.

21055131032 is an abundant number, since it is smaller than the sum of its proper divisors (21460037608).

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

21055131032 is a wasteful number, since it uses less digits than its factorization.

21055131032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202453202 (or 202453198 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 21055131032 its reverse (23013155012), we get a palindrome (44068286044).

The spelling of 21055131032 in words is "twenty-one billion, fifty-five million, one hundred thirty-one thousand, thirty-two".