21148003888 has 80 divisors (see below), whose sum is σ = 45099568800. Its totient is φ = 9526937600.

The previous prime is 21148003853. The next prime is 21148003939. The reversal of 21148003888 is 88830084112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22473498 + ... + 22474438.

It is an arithmetic number, because the mean of its divisors is an integer number (563744610).

Almost surely, 2^21148003888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21148003888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22549784400).

21148003888 is an abundant number, since it is smaller than the sum of its proper divisors (23951564912).

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

21148003888 is a wasteful number, since it uses less digits than its factorization.

21148003888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966 (or 1960 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 43.

The spelling of 21148003888 in words is "twenty-one billion, one hundred forty-eight million, three thousand, eight hundred eighty-eight".