21359048 has 8 divisors (see below), whose sum is σ = 40048230. Its totient is φ = 10679520.

The previous prime is 21359047. The next prime is 21359057. The reversal of 21359048 is 84095312.

It can be written as a sum of positive squares in only one way, i.e., 21325924 + 33124 = 4618^2 + 182^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (21359047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334933 + ... + 1334948.

Almost surely, 2^21359048 is an apocalyptic number.

It is an amenable number.

21359048 is a deficient number, since it is larger than the sum of its proper divisors (18689182).

21359048 is a wasteful number, since it uses less digits than its factorization.

21359048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669887 (or 2669883 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 21359048 is about 4621.5850094962. The cubic root of 21359048 is about 277.4558997095.

The spelling of 21359048 in words is "twenty-one million, three hundred fifty-nine thousand, forty-eight".