19226989 has 4 divisors (see below), whose sum is σ = 19243840. Its totient is φ = 19210140.

The previous prime is 19226951. The next prime is 19227007. The reversal of 19226989 is 98962291.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19226989 - 2¹⁹ = 18702701 is a prime.

It is a super-3 number, since 3×19226989³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19223989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6579 + ... + 9040.

It is an arithmetic number, because the mean of its divisors is an integer number (4810960).

Almost surely, 2^19226989 is an apocalyptic number.

It is an amenable number.

19226989 is a deficient number, since it is larger than the sum of its proper divisors (16851).

19226989 is a wasteful number, since it uses less digits than its factorization.

19226989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16850.

The product of its digits is 139968, while the sum is 46.

The square root of 19226989 is about 4384.8590627294. The cubic root of 19226989 is about 267.8985888307.

It can be divided in two parts, 1922 and 6989, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 19226989 in words is "nineteen million, two hundred twenty-six thousand, nine hundred eighty-nine".