19900006 has 32 divisors (see below), whose sum is σ = 35929152. Its totient is φ = 8087040.

The previous prime is 19899989. The next prime is 19900009. The reversal of 19900006 is 60000991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19900009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20770 + ... + 21706.

It is an arithmetic number, because the mean of its divisors is an integer number (1122786).

Almost surely, 2^19900006 is an apocalyptic number.

19900006 is a deficient number, since it is larger than the sum of its proper divisors (16029146).

19900006 is a wasteful number, since it uses less digits than its factorization.

19900006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 19900006 is about 4460.9422771428. The cubic root of 19900006 is about 270.9886298521.

Adding to 19900006 its reverse (60000991), we get a palindrome (79900997).

The spelling of 19900006 in words is "nineteen million, nine hundred thousand, six".