19900689 has 8 divisors (see below), whose sum is σ = 26574912. Its totient is φ = 13246800.

The previous prime is 19900679. The next prime is 19900691. The reversal of 19900689 is 98600991.

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

It is not a de Polignac number, because 19900689 - 2¹² = 19896593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19900689.

It is not an unprimeable number, because it can be changed into a prime (19900679) 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, 2629 + ... + 6834.

It is an arithmetic number, because the mean of its divisors is an integer number (3321864).

Almost surely, 2^19900689 is an apocalyptic number.

It is an amenable number.

19900689 is a deficient number, since it is larger than the sum of its proper divisors (6674223).

19900689 is an equidigital number, since it uses as much as digits as its factorization.

19900689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10167.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 19900689 is about 4461.0188298190. The cubic root of 19900689 is about 270.9917300708.

The spelling of 19900689 in words is "nineteen million, nine hundred thousand, six hundred eighty-nine".