19899801 has 24 divisors (see below), whose sum is σ = 29702400. Its totient is φ = 12830400.

The previous prime is 19899793. The next prime is 19899827. The reversal of 19899801 is 10899891.

It is not a de Polignac number, because 19899801 - 2³ = 19899793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19899881) 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, 73296 + ... + 73566.

It is an arithmetic number, because the mean of its divisors is an integer number (1237600).

Almost surely, 2^19899801 is an apocalyptic number.

It is an amenable number.

19899801 is a deficient number, since it is larger than the sum of its proper divisors (9802599).

19899801 is a wasteful number, since it uses less digits than its factorization.

19899801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 19899801 is about 4460.9192998753. The cubic root of 19899801 is about 270.9876993187.

It can be divided in two parts, 198 and 99801, that added together give a palindrome (99999).

The spelling of 19899801 in words is "nineteen million, eight hundred ninety-nine thousand, eight hundred one".