189700019236 has 144 divisors (see below), whose sum is σ = 419193460224. Its totient is φ = 74451170304.

The previous prime is 189700019233. The next prime is 189700019303. The reversal of 189700019236 is 632910007981.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (189700019233) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 319898556 + ... + 319899148.

It is an arithmetic number, because the mean of its divisors is an integer number (2911065696).

Almost surely, 2^189700019236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189700019236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209596730112).

189700019236 is an abundant number, since it is smaller than the sum of its proper divisors (229493440988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189700019236 is a wasteful number, since it uses less digits than its factorization.

189700019236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410 (or 1401 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 189700019236 in words is "one hundred eighty-nine billion, seven hundred million, nineteen thousand, two hundred thirty-six".