21760612 has 12 divisors (see below), whose sum is σ = 40321260. Its totient is φ = 10240256.

The previous prime is 21760597. The next prime is 21760619. The reversal of 21760612 is 21606712.

It can be written as a sum of positive squares in 2 ways, for example, as 19927296 + 1833316 = 4464^2 + 1354^2 .

It is a super-2 number, since 2×21760612² = 947048469229088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21760619) 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, 159937 + ... + 160072.

It is an arithmetic number, because the mean of its divisors is an integer number (3360105).

Almost surely, 2^21760612 is an apocalyptic number.

It is an amenable number.

21760612 is a deficient number, since it is larger than the sum of its proper divisors (18560648).

21760612 is a wasteful number, since it uses less digits than its factorization.

21760612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320030 (or 320028 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 21760612 is about 4664.8271136238. The cubic root of 21760612 is about 279.1838991763.

The spelling of 21760612 in words is "twenty-one million, seven hundred sixty thousand, six hundred twelve".