20161556350 has 36 divisors (see below), whose sum is σ = 40607061696. Its totient is φ = 7444263840.

The previous prime is 20161556333. The next prime is 20161556369. The reversal of 20161556350 is 5365516102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1184542 + ... + 1201441.

It is an arithmetic number, because the mean of its divisors is an integer number (1127973936).

Almost surely, 2^20161556350 is an apocalyptic number.

20161556350 is an abundant number, since it is smaller than the sum of its proper divisors (20445505346).

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

20161556350 is a wasteful number, since it uses less digits than its factorization.

20161556350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386021 (or 2386003 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 20161556350 in words is "twenty billion, one hundred sixty-one million, five hundred fifty-six thousand, three hundred fifty".