16151820 has 48 divisors (see below), whose sum is σ = 45453408. Its totient is φ = 4285440.

The previous prime is 16151813. The next prime is 16151831. The reversal of 16151820 is 2815161.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13902 + ... + 15018.

It is an arithmetic number, because the mean of its divisors is an integer number (946946).

Almost surely, 2^16151820 is an apocalyptic number.

16151820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16151820 is an abundant number, since it is smaller than the sum of its proper divisors (29301588).

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

16151820 is a wasteful number, since it uses less digits than its factorization.

16151820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370 (or 1368 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 16151820 is about 4018.9326941366. The cubic root of 16151820 is about 252.7787073812.

Adding to 16151820 its reverse (2815161), we get a palindrome (18966981).

The spelling of 16151820 in words is "sixteen million, one hundred fifty-one thousand, eight hundred twenty".