20053187 has 24 divisors (see below), whose sum is σ = 25929216. Its totient is φ = 15066000.

The previous prime is 20053153. The next prime is 20053211. The reversal of 20053187 is 78135002.

It is not a de Polignac number, because 20053187 - 2¹² = 20049091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20053147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73862 + ... + 74132.

It is an arithmetic number, because the mean of its divisors is an integer number (1080384).

Almost surely, 2^20053187 is an apocalyptic number.

20053187 is a deficient number, since it is larger than the sum of its proper divisors (5876029).

20053187 is a wasteful number, since it uses less digits than its factorization.

20053187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 20053187 is about 4478.0784941758. The cubic root of 20053187 is about 271.6821682265.

Adding to 20053187 its reverse (78135002), we get a palindrome (98188189).

The spelling of 20053187 in words is "twenty million, fifty-three thousand, one hundred eighty-seven".