16764820 has 24 divisors (see below), whose sum is σ = 35283528. Its totient is φ = 6691200.

The previous prime is 16764817. The next prime is 16764823. The reversal of 16764820 is 2846761.

It is an interprime number because it is at equal distance from previous prime (16764817) and next prime (16764823).

It can be written as a sum of positive squares in 4 ways, for example, as 988036 + 15776784 = 994^2 + 3972^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16764823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15910 + ... + 16930.

It is an arithmetic number, because the mean of its divisors is an integer number (1470147).

Almost surely, 2^16764820 is an apocalyptic number.

16764820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16764820 is an abundant number, since it is smaller than the sum of its proper divisors (18518708).

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

16764820 is a wasteful number, since it uses less digits than its factorization.

16764820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851 (or 1849 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 16764820 is about 4094.4865367955. The cubic root of 16764820 is about 255.9369351490.

The spelling of 16764820 in words is "sixteen million, seven hundred sixty-four thousand, eight hundred twenty".