21248846 has 4 divisors (see below), whose sum is σ = 31873272. Its totient is φ = 10624422.

The previous prime is 21248831. The next prime is 21248879. The reversal of 21248846 is 64884212.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5312210 + ... + 5312213.

It is an arithmetic number, because the mean of its divisors is an integer number (7968318).

Almost surely, 2^21248846 is an apocalyptic number.

21248846 is a deficient number, since it is larger than the sum of its proper divisors (10624426).

21248846 is a wasteful number, since it uses less digits than its factorization.

21248846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10624425.

The product of its digits is 24576, while the sum is 35.

The square root of 21248846 is about 4609.6470580729. The cubic root of 21248846 is about 276.9778988131.

The spelling of 21248846 in words is "twenty-one million, two hundred forty-eight thousand, eight hundred forty-six".