16811144920 has 32 divisors (see below), whose sum is σ = 37932261120. Its totient is φ = 6705402880.

The previous prime is 16811144899. The next prime is 16811144921. The reversal of 16811144920 is 2944111861.

It is a super-2 number, since 2×16811144920² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16811144920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16811144921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581176 + ... + 609415.

It is an arithmetic number, because the mean of its divisors is an integer number (1185383160).

Almost surely, 2^16811144920 is an apocalyptic number.

16811144920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16811144920 is an abundant number, since it is smaller than the sum of its proper divisors (21121116200).

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

16811144920 is a wasteful number, since it uses less digits than its factorization.

16811144920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190955 (or 1190951 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 16811144920 in words is "sixteen billion, eight hundred eleven million, one hundred forty-four thousand, nine hundred twenty".