21867230 has 48 divisors (see below), whose sum is σ = 49962096. Its totient is φ = 6814080.

The previous prime is 21867221. The next prime is 21867277. The reversal of 21867230 is 3276812.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21867193 and 21867202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3362 + ... + 7418.

It is an arithmetic number, because the mean of its divisors is an integer number (1040877).

Almost surely, 2^21867230 is an apocalyptic number.

21867230 is an abundant number, since it is smaller than the sum of its proper divisors (28094866).

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

21867230 is a wasteful number, since it uses less digits than its factorization.

21867230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4089 (or 4082 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 21867230 is about 4676.2410117529. The cubic root of 21867230 is about 279.6391184063.

The spelling of 21867230 in words is "twenty-one million, eight hundred sixty-seven thousand, two hundred thirty".