21876774 has 8 divisors (see below), whose sum is σ = 43753560. Its totient is φ = 7292256.

The previous prime is 21876769. The next prime is 21876779. The reversal of 21876774 is 47767812.

It is an interprime number because it is at equal distance from previous prime (21876769) and next prime (21876779).

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

21876774 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21876779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1823059 + ... + 1823070.

It is an arithmetic number, because the mean of its divisors is an integer number (5469195).

Almost surely, 2^21876774 is an apocalyptic number.

21876774 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21876774 is a wasteful number, since it uses less digits than its factorization.

21876774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3646134.

The product of its digits is 131712, while the sum is 42.

The square root of 21876774 is about 4677.2613781999. The cubic root of 21876774 is about 279.6797955224.

The spelling of 21876774 in words is "twenty-one million, eight hundred seventy-six thousand, seven hundred seventy-four".