21054445332 has 24 divisors (see below), whose sum is σ = 49233158016. Its totient is φ = 7002988608.

The previous prime is 21054445327. The next prime is 21054445343. The reversal of 21054445332 is 23354445012.

It is a junction number, because it is equal to n+sod(n) for n = 21054445293 and 21054445302.

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, 1889193 + ... + 1900304.

It is an arithmetic number, because the mean of its divisors is an integer number (2051381584).

Almost surely, 2^21054445332 is an apocalyptic number.

It is an amenable number.

21054445332 is an abundant number, since it is smaller than the sum of its proper divisors (28178712684).

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

21054445332 is a wasteful number, since it uses less digits than its factorization.

21054445332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3789967 (or 3789965 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

The spelling of 21054445332 in words is "twenty-one billion, fifty-four million, four hundred forty-five thousand, three hundred thirty-two".