21770876 has 12 divisors (see below), whose sum is σ = 38342808. Its totient is φ = 10815792.

The previous prime is 21770873. The next prime is 21770893. The reversal of 21770876 is 67807712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21770873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16706 + ... + 17961.

It is an arithmetic number, because the mean of its divisors is an integer number (3195234).

Almost surely, 2^21770876 is an apocalyptic number.

It is an amenable number.

21770876 is a deficient number, since it is larger than the sum of its proper divisors (16571932).

21770876 is a wasteful number, since it uses less digits than its factorization.

21770876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34828 (or 34826 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 38.

The square root of 21770876 is about 4665.9271318785. The cubic root of 21770876 is about 279.2277872361.

The spelling of 21770876 in words is "twenty-one million, seven hundred seventy thousand, eight hundred seventy-six".