21599230 has 8 divisors (see below), whose sum is σ = 38878632. Its totient is φ = 8639688.

The previous prime is 21599213. The next prime is 21599243. The reversal of 21599230 is 3299512.

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

It is a junction number, because it is equal to n+sod(n) for n = 21599192 and 21599201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1079952 + ... + 1079971.

It is an arithmetic number, because the mean of its divisors is an integer number (4859829).

Almost surely, 2^21599230 is an apocalyptic number.

21599230 is a deficient number, since it is larger than the sum of its proper divisors (17279402).

21599230 is a wasteful number, since it uses less digits than its factorization.

21599230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159930.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 21599230 is about 4647.4971759002. The cubic root of 21599230 is about 278.4920206965.

The spelling of 21599230 in words is "twenty-one million, five hundred ninety-nine thousand, two hundred thirty".