20774660 has 24 divisors (see below), whose sum is σ = 43975680. Its totient is φ = 8243424.

The previous prime is 20774653. The next prime is 20774683. The reversal of 20774660 is 6647702.

It is a happy number.

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, 1550 + ... + 6629.

It is an arithmetic number, because the mean of its divisors is an integer number (1832320).

Almost surely, 2^20774660 is an apocalyptic number.

20774660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20774660 is an abundant number, since it is smaller than the sum of its proper divisors (23201020).

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

20774660 is a wasteful number, since it uses less digits than its factorization.

20774660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8315 (or 8313 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 20774660 is about 4557.9227724919. The cubic root of 20774660 is about 274.9020477592.

The spelling of 20774660 in words is "twenty million, seven hundred seventy-four thousand, six hundred sixty".