21048655 has 8 divisors (see below), whose sum is σ = 25291584. Its totient is φ = 16816800.

The previous prime is 21048649. The next prime is 21048701. The reversal of 21048655 is 55684012.

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

It is not a de Polignac number, because 21048655 - 2³ = 21048647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2245 + ... + 6865.

It is an arithmetic number, because the mean of its divisors is an integer number (3161448).

Almost surely, 2^21048655 is an apocalyptic number.

21048655 is a deficient number, since it is larger than the sum of its proper divisors (4242929).

21048655 is an equidigital number, since it uses as much as digits as its factorization.

21048655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5537.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 21048655 is about 4587.8813193020. The cubic root of 21048655 is about 276.1053254457.

The spelling of 21048655 in words is "twenty-one million, forty-eight thousand, six hundred fifty-five".