21048207 has 8 divisors (see below), whose sum is σ = 28419840. Its totient is φ = 13854360.

The previous prime is 21048173. The next prime is 21048221. The reversal of 21048207 is 70284012.

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

It is not a de Polignac number, because 21048207 - 2⁸ = 21047951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21048007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44169 + ... + 44642.

It is an arithmetic number, because the mean of its divisors is an integer number (3552480).

Almost surely, 2^21048207 is an apocalyptic number.

21048207 is a deficient number, since it is larger than the sum of its proper divisors (7371633).

21048207 is an equidigital number, since it uses as much as digits as its factorization.

21048207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88893.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 21048207 is about 4587.8324947626. The cubic root of 21048207 is about 276.1033665547.

The spelling of 21048207 in words is "twenty-one million, forty-eight thousand, two hundred seven".