16881420 has 24 divisors (see below), whose sum is σ = 47268144. Its totient is φ = 4501696.

The previous prime is 16881419. The next prime is 16881427. The reversal of 16881420 is 2418861.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (16881427) 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, 140619 + ... + 140738.

It is an arithmetic number, because the mean of its divisors is an integer number (1969506).

Almost surely, 2^16881420 is an apocalyptic number.

16881420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16881420 is an abundant number, since it is smaller than the sum of its proper divisors (30386724).

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

16881420 is a wasteful number, since it uses less digits than its factorization.

16881420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281369 (or 281367 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 16881420 is about 4108.7005244968. The cubic root of 16881420 is about 256.5289154199.

The spelling of 16881420 in words is "sixteen million, eight hundred eighty-one thousand, four hundred twenty".