21770334 has 12 divisors (see below), whose sum is σ = 47169096. Its totient is φ = 7256772.

The previous prime is 21770323. The next prime is 21770363. The reversal of 21770334 is 43307712.

It is a junction number, because it is equal to n+sod(n) for n = 21770298 and 21770307.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 604714 + ... + 604749.

It is an arithmetic number, because the mean of its divisors is an integer number (3930758).

Almost surely, 2^21770334 is an apocalyptic number.

21770334 is an abundant number, since it is smaller than the sum of its proper divisors (25398762).

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

21770334 is a wasteful number, since it uses less digits than its factorization.

21770334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209471 (or 1209468 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 21770334 is about 4665.8690508843. The cubic root of 21770334 is about 279.2254700316.

The spelling of 21770334 in words is "twenty-one million, seven hundred seventy thousand, three hundred thirty-four".