20006188 has 6 divisors (see below), whose sum is σ = 35010836. Its totient is φ = 10003092.

The previous prime is 20006179. The next prime is 20006209. The reversal of 20006188 is 88160002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500770 + ... + 2500777.

Almost surely, 2^20006188 is an apocalyptic number.

It is an amenable number.

20006188 is a deficient number, since it is larger than the sum of its proper divisors (15004648).

20006188 is a wasteful number, since it uses less digits than its factorization.

20006188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5001551 (or 5001549 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 20006188 is about 4472.8277409263. The cubic root of 20006188 is about 271.4697534665.

The spelling of 20006188 in words is "twenty million, six thousand, one hundred eighty-eight".