21148695 has 40 divisors (see below), whose sum is σ = 38448960. Its totient is φ = 11119680.

The previous prime is 21148679. The next prime is 21148703. The reversal of 21148695 is 59684112.

It is not a de Polignac number, because 21148695 - 2⁴ = 21148679 is a prime.

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 39 ways as a sum of consecutive naturals, for example, 31665 + ... + 32325.

It is an arithmetic number, because the mean of its divisors is an integer number (961224).

Almost surely, 2^21148695 is an apocalyptic number.

21148695 is a deficient number, since it is larger than the sum of its proper divisors (17300265).

21148695 is an equidigital number, since it uses as much as digits as its factorization.

21148695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757 (or 748 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 21148695 is about 4598.7710314822. The cubic root of 21148695 is about 276.5420585294.

The spelling of 21148695 in words is "twenty-one million, one hundred forty-eight thousand, six hundred ninety-five".