21770514 has 24 divisors (see below), whose sum is σ = 47354112. Its totient is φ = 7228440.

The previous prime is 21770479. The next prime is 21770521. The reversal of 21770514 is 41507712.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2647 + ... + 7109.

It is an arithmetic number, because the mean of its divisors is an integer number (1973088).

Almost surely, 2^21770514 is an apocalyptic number.

21770514 is an abundant number, since it is smaller than the sum of its proper divisors (25583598).

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

21770514 is a wasteful number, since it uses less digits than its factorization.

21770514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4742 (or 4739 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 21770514 is about 4665.8883398556. Note that the first 3 decimals coincide. The cubic root of 21770514 is about 279.2262395872.

The spelling of 21770514 in words is "twenty-one million, seven hundred seventy thousand, five hundred fourteen".