20187072 has 84 divisors (see below), whose sum is σ = 58603896. Its totient is φ = 6643200.

The previous prime is 20187071. The next prime is 20187113. The reversal of 20187072 is 27078102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20187071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58003 + ... + 58349.

Almost surely, 2^20187072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20187072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29301948).

20187072 is an abundant number, since it is smaller than the sum of its proper divisors (38416824).

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

20187072 is a wasteful number, since it uses less digits than its factorization.

20187072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 20187072 is about 4493.0025595363. The cubic root of 20187072 is about 272.2854557966.

The spelling of 20187072 in words is "twenty million, one hundred eighty-seven thousand, seventy-two".