20766380 has 12 divisors (see below), whose sum is σ = 43609440. Its totient is φ = 8306544.

The previous prime is 20766379. The next prime is 20766391. The reversal of 20766380 is 8366702.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519140 + ... + 519179.

It is an arithmetic number, because the mean of its divisors is an integer number (3634120).

Almost surely, 2^20766380 is an apocalyptic number.

20766380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20766380 is an abundant number, since it is smaller than the sum of its proper divisors (22843060).

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

20766380 is a wasteful number, since it uses less digits than its factorization.

20766380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038328 (or 1038326 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 20766380 is about 4557.0143734687. The cubic root of 20766380 is about 274.8655210254.

The spelling of 20766380 in words is "twenty million, seven hundred sixty-six thousand, three hundred eighty".