21792648 has 32 divisors (see below), whose sum is σ = 55812960. Its totient is φ = 7086720.

The previous prime is 21792647. The next prime is 21792649. The reversal of 21792648 is 84629712.

It is an interprime number because it is at equal distance from previous prime (21792647) and next prime (21792649).

It is not an unprimeable number, because it can be changed into a prime (21792643) 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, 10090 + ... + 12057.

It is an arithmetic number, because the mean of its divisors is an integer number (1744155).

Almost surely, 2^21792648 is an apocalyptic number.

It is an amenable number.

21792648 is an abundant number, since it is smaller than the sum of its proper divisors (34020312).

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

21792648 is a wasteful number, since it uses less digits than its factorization.

21792648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22197 (or 22193 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 21792648 is about 4668.2596328825. The cubic root of 21792648 is about 279.3208369593.

The spelling of 21792648 in words is "twenty-one million, seven hundred ninety-two thousand, six hundred forty-eight".