21879062 has 8 divisors (see below), whose sum is σ = 33705696. Its totient is φ = 10643832.

The previous prime is 21879047. The next prime is 21879083. The reversal of 21879062 is 26097812.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147758 + ... + 147905.

It is an arithmetic number, because the mean of its divisors is an integer number (4213212).

Almost surely, 2^21879062 is an apocalyptic number.

21879062 is a deficient number, since it is larger than the sum of its proper divisors (11826634).

21879062 is a wasteful number, since it uses less digits than its factorization.

21879062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295702.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 21879062 is about 4677.5059593762. The cubic root of 21879062 is about 279.6895453613.

The spelling of 21879062 in words is "twenty-one million, eight hundred seventy-nine thousand, sixty-two".