20552187 has 8 divisors (see below), whose sum is σ = 27674640. Its totient is φ = 13565600.

The previous prime is 20552177. The next prime is 20552249. The reversal of 20552187 is 78125502.

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

It is a cyclic number.

It is not a de Polignac number, because 20552187 - 2⁴ = 20552171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20552117) 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, 33612 + ... + 34217.

It is an arithmetic number, because the mean of its divisors is an integer number (3459330).

Almost surely, 2^20552187 is an apocalyptic number.

20552187 is a deficient number, since it is larger than the sum of its proper divisors (7122453).

20552187 is a wasteful number, since it uses less digits than its factorization.

20552187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67933.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 20552187 is about 4533.4519959960. The cubic root of 20552187 is about 273.9172277374.

Adding to 20552187 its reverse (78125502), we get a palindrome (98677689).

The spelling of 20552187 in words is "twenty million, five hundred fifty-two thousand, one hundred eighty-seven".