21148190 has 32 divisors (see below), whose sum is σ = 43671744. Its totient is φ = 7223040.

The previous prime is 21148177. The next prime is 21148199. The reversal of 21148190 is 9184112.

It is a super-2 number, since 2×21148190² = 894491880552200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21148199) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 27410 + ... + 28170.

It is an arithmetic number, because the mean of its divisors is an integer number (1364742).

Almost surely, 2^21148190 is an apocalyptic number.

21148190 is an abundant number, since it is smaller than the sum of its proper divisors (22523554).

21148190 is a wasteful number, since it uses less digits than its factorization.

21148190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 21148190 is about 4598.7161251810. The cubic root of 21148190 is about 276.5398573715.

The spelling of 21148190 in words is "twenty-one million, one hundred forty-eight thousand, one hundred ninety".