20169090234 has 80 divisors (see below), whose sum is σ = 46962279936. Its totient is φ = 6462828000.

The previous prime is 20169090209. The next prime is 20169090247. The reversal of 20169090234 is 43209096102.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 745024 + ... + 771620.

Almost surely, 2^20169090234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20169090234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23481139968).

20169090234 is an abundant number, since it is smaller than the sum of its proper divisors (26793189702).

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

20169090234 is a wasteful number, since it uses less digits than its factorization.

20169090234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26793 (or 26784 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 20169090234 in words is "twenty billion, one hundred sixty-nine million, ninety thousand, two hundred thirty-four".