18771072 has 32 divisors (see below), whose sum is σ = 49861680. Its totient is φ = 6256896.

The previous prime is 18771041. The next prime is 18771083. The reversal of 18771072 is 27017781.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24058 + ... + 24825.

Almost surely, 2^18771072 is an apocalyptic number.

18771072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18771072 is an abundant number, since it is smaller than the sum of its proper divisors (31090608).

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

18771072 is an equidigital number, since it uses as much as digits as its factorization.

18771072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48900 (or 48888 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 33.

The square root of 18771072 is about 4332.5595206529. The cubic root of 18771072 is about 265.7641265540.

The spelling of 18771072 in words is "eighteen million, seven hundred seventy-one thousand, seventy-two".