21702048 has 24 divisors (see below), whose sum is σ = 56968128. Its totient is φ = 7233984.

The previous prime is 21702001. The next prime is 21702049. The reversal of 21702048 is 84020712.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21702049) 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, 112936 + ... + 113127.

It is an arithmetic number, because the mean of its divisors is an integer number (2373672).

Almost surely, 2^21702048 is an apocalyptic number.

It is an amenable number.

21702048 is an abundant number, since it is smaller than the sum of its proper divisors (35266080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21702048 is a wasteful number, since it uses less digits than its factorization.

21702048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226076 (or 226068 counting only the distinct ones).

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

The square root of 21702048 is about 4658.5456958154. The cubic root of 21702048 is about 278.9332197154.

The spelling of 21702048 in words is "twenty-one million, seven hundred two thousand, forty-eight".