20187037 has 8 divisors (see below), whose sum is σ = 21838040. Its totient is φ = 18550080.

The previous prime is 20187023. The next prime is 20187043. The reversal of 20187037 is 73078102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3426201 + 16760836 = 1851^2 + 4094^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20187037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20186996 and 20187014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20187137) 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, 414 + ... + 6367.

It is an arithmetic number, because the mean of its divisors is an integer number (2729755).

Almost surely, 2^20187037 is an apocalyptic number.

It is an amenable number.

20187037 is a deficient number, since it is larger than the sum of its proper divisors (1651003).

20187037 is a wasteful number, since it uses less digits than its factorization.

20187037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7023.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 20187037 is about 4492.9986645892. The cubic root of 20187037 is about 272.2852984352.

The spelling of 20187037 in words is "twenty million, one hundred eighty-seven thousand, thirty-seven".