21377675 has 36 divisors (see below), whose sum is σ = 30081408. Its totient is φ = 15048000.

The previous prime is 21377663. The next prime is 21377677. The reversal of 21377675 is 57677312.

It is not a de Polignac number, because 21377675 - 2¹⁰ = 21376651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21377677) 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 35 ways as a sum of consecutive naturals, for example, 111830 + ... + 112020.

Almost surely, 2^21377675 is an apocalyptic number.

21377675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21377675 is a deficient number, since it is larger than the sum of its proper divisors (8703733).

21377675 is a wasteful number, since it uses less digits than its factorization.

21377675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 244 counting only the distinct ones).

The product of its digits is 61740, while the sum is 38.

The square root of 21377675 is about 4623.5997880439. The cubic root of 21377675 is about 277.5365317271.

The spelling of 21377675 in words is "twenty-one million, three hundred seventy-seven thousand, six hundred seventy-five".