21148675 has 12 divisors (see below), whose sum is σ = 26434816. Its totient is φ = 16783200.

The previous prime is 21148667. The next prime is 21148679. The reversal of 21148675 is 57684112.

It is not a de Polignac number, because 21148675 - 2³ = 21148667 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21148675.

It is not an unprimeable number, because it can be changed into a prime (21148679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156 + ... + 6505.

Almost surely, 2^21148675 is an apocalyptic number.

21148675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21148675 is a deficient number, since it is larger than the sum of its proper divisors (5286141).

21148675 is a wasteful number, since it uses less digits than its factorization.

21148675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6798 (or 6793 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 21148675 is about 4598.7688569877. The cubic root of 21148675 is about 276.5419713555.

The spelling of 21148675 in words is "twenty-one million, one hundred forty-eight thousand, six hundred seventy-five".