21773060 has 24 divisors (see below), whose sum is σ = 45818136. Its totient is φ = 8691200.

The previous prime is 21773047. The next prime is 21773071. The reversal of 21773060 is 6037712.

It can be written as a sum of positive squares in 4 ways, for example, as 1827904 + 19945156 = 1352^2 + 4466^2 .

It is a super-2 number, since 2×21773060² = 948132283527200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13244 + ... + 14796.

It is an arithmetic number, because the mean of its divisors is an integer number (1909089).

Almost surely, 2^21773060 is an apocalyptic number.

21773060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21773060 is an abundant number, since it is smaller than the sum of its proper divisors (24045076).

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

21773060 is a wasteful number, since it uses less digits than its factorization.

21773060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263 (or 2261 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 21773060 is about 4666.1611630976. The cubic root of 21773060 is about 279.2371240691.

The spelling of 21773060 in words is "twenty-one million, seven hundred seventy-three thousand, sixty".