16761220 has 24 divisors (see below), whose sum is σ = 40227264. Its totient is φ = 5746656.

The previous prime is 16761191. The next prime is 16761221. The reversal of 16761220 is 2216761.

It is not an unprimeable number, because it can be changed into a prime (16761221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59722 + ... + 60001.

It is an arithmetic number, because the mean of its divisors is an integer number (1676136).

Almost surely, 2^16761220 is an apocalyptic number.

16761220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16761220 is an abundant number, since it is smaller than the sum of its proper divisors (23466044).

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

16761220 is a wasteful number, since it uses less digits than its factorization.

16761220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119739 (or 119737 counting only the distinct ones).

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

The square root of 16761220 is about 4094.0468976308. The cubic root of 16761220 is about 255.9186142659.

Adding to 16761220 its reverse (2216761), we get a palindrome (18977981).

The spelling of 16761220 in words is "sixteen million, seven hundred sixty-one thousand, two hundred twenty".