16261820 has 12 divisors (see below), whose sum is σ = 34149864. Its totient is φ = 6504720.

The previous prime is 16261811. The next prime is 16261823. The reversal of 16261820 is 2816261.

16261820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 16261820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16261823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406526 + ... + 406565.

It is an arithmetic number, because the mean of its divisors is an integer number (2845822).

Almost surely, 2^16261820 is an apocalyptic number.

16261820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16261820 is an abundant number, since it is smaller than the sum of its proper divisors (17888044).

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

16261820 is a wasteful number, since it uses less digits than its factorization.

16261820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813100 (or 813098 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 16261820 is about 4032.5946982061. The cubic root of 16261820 is about 253.3512491177.

The spelling of 16261820 in words is "sixteen million, two hundred sixty-one thousand, eight hundred twenty".