21377883 has 8 divisors (see below), whose sum is σ = 28987200. Its totient is φ = 14010248.

The previous prime is 21377861. The next prime is 21377929. The reversal of 21377883 is 38877312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21377883 - 2⁸ = 21377627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21377183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60213 + ... + 60566.

It is an arithmetic number, because the mean of its divisors is an integer number (3623400).

Almost surely, 2^21377883 is an apocalyptic number.

21377883 is a deficient number, since it is larger than the sum of its proper divisors (7609317).

21377883 is a wasteful number, since it uses less digits than its factorization.

21377883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120841.

The product of its digits is 56448, while the sum is 39.

The square root of 21377883 is about 4623.6222812855. The cubic root of 21377883 is about 277.5374318470.

The spelling of 21377883 in words is "twenty-one million, three hundred seventy-seven thousand, eight hundred eighty-three".