2189618942 has 8 divisors (see below), whose sum is σ = 3753632496. Its totient is φ = 938408112.

The previous prime is 2189618917. The next prime is 2189618969. The reversal of 2189618942 is 2498169812.

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

It is a super-2 number, since 2×2189618942² = 9588862222330398728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78200663 + ... + 78200690.

It is an arithmetic number, because the mean of its divisors is an integer number (469204062).

Almost surely, 2^2189618942 is an apocalyptic number.

2189618942 is a deficient number, since it is larger than the sum of its proper divisors (1564013554).

2189618942 is a wasteful number, since it uses less digits than its factorization.

2189618942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156401362.

The product of its digits is 497664, while the sum is 50.

The square root of 2189618942 is about 46793.3642945236. The cubic root of 2189618942 is about 1298.5425366308.

The spelling of 2189618942 in words is "two billion, one hundred eighty-nine million, six hundred eighteen thousand, nine hundred forty-two".