21448677 has 4 divisors (see below), whose sum is σ = 28598240. Its totient is φ = 14299116.

The previous prime is 21448667. The next prime is 21448711. The reversal of 21448677 is 77684412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21448677 - 2⁶ = 21448613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21448607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3574777 + ... + 3574782.

It is an arithmetic number, because the mean of its divisors is an integer number (7149560).

Almost surely, 2^21448677 is an apocalyptic number.

It is an amenable number.

21448677 is a deficient number, since it is larger than the sum of its proper divisors (7149563).

21448677 is an equidigital number, since it uses as much as digits as its factorization.

21448677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7149562.

The product of its digits is 75264, while the sum is 39.

The square root of 21448677 is about 4631.2716396256. The cubic root of 21448677 is about 277.8434542957.

The spelling of 21448677 in words is "twenty-one million, four hundred forty-eight thousand, six hundred seventy-seven".