21148104 has 16 divisors (see below), whose sum is σ = 52870320. Its totient is φ = 7049360.

The previous prime is 21148079. The next prime is 21148123. The reversal of 21148104 is 40184112.

It is a happy 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, 440562 + ... + 440609.

It is an arithmetic number, because the mean of its divisors is an integer number (3304395).

Almost surely, 2^21148104 is an apocalyptic number.

21148104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21148104 is an abundant number, since it is smaller than the sum of its proper divisors (31722216).

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

21148104 is a wasteful number, since it uses less digits than its factorization.

21148104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881180 (or 881176 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 21148104 is about 4598.7067747357. The cubic root of 21148104 is about 276.5394825173.

The spelling of 21148104 in words is "twenty-one million, one hundred forty-eight thousand, one hundred four".