21230048 has 24 divisors (see below), whose sum is σ = 47768112. Its totient is φ = 9098496.

The previous prime is 21230047. The next prime is 21230123. The reversal of 21230048 is 84003212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47165 + ... + 47612.

It is an arithmetic number, because the mean of its divisors is an integer number (1990338).

Almost surely, 2^21230048 is an apocalyptic number.

21230048 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21230048 is an abundant number, since it is smaller than the sum of its proper divisors (26538064).

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

21230048 is an equidigital number, since it uses as much as digits as its factorization.

21230048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94794 (or 94786 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 21230048 is about 4607.6076221831. The cubic root of 21230048 is about 276.8961976443.

The spelling of 21230048 in words is "twenty-one million, two hundred thirty thousand, forty-eight".