20161354433 has 16 divisors (see below), whose sum is σ = 22257395136. Its totient is φ = 18110485440.

The previous prime is 20161354417. The next prime is 20161354441. The reversal of 20161354433 is 33445316102.

It is a cyclic number.

It is not a de Polignac number, because 20161354433 - 2⁴ = 20161354417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20161354433.

It is not an unprimeable number, because it can be changed into a prime (20161354033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277691 + ... + 342687.

It is an arithmetic number, because the mean of its divisors is an integer number (1391087196).

Almost surely, 2^20161354433 is an apocalyptic number.

It is an amenable number.

20161354433 is a deficient number, since it is larger than the sum of its proper divisors (2096040703).

20161354433 is a wasteful number, since it uses less digits than its factorization.

20161354433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65344.

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 20161354433 in words is "twenty billion, one hundred sixty-one million, three hundred fifty-four thousand, four hundred thirty-three".