21148302 has 24 divisors (see below), whose sum is σ = 49202856. Its totient is φ = 6042288.

The previous prime is 21148297. The next prime is 21148321. The reversal of 21148302 is 20384112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35673 + ... + 36260.

It is an arithmetic number, because the mean of its divisors is an integer number (2050119).

Almost surely, 2^21148302 is an apocalyptic number.

21148302 is an abundant number, since it is smaller than the sum of its proper divisors (28054554).

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

21148302 is a wasteful number, since it uses less digits than its factorization.

21148302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71952 (or 71945 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 21148302 is about 4598.7283024767. The cubic root of 21148302 is about 276.5403455521.

The spelling of 21148302 in words is "twenty-one million, one hundred forty-eight thousand, three hundred two".