2161020294 has 12 divisors (see below), whose sum is σ = 4682210676. Its totient is φ = 720340092.

The previous prime is 2161020293. The next prime is 2161020311. The reversal of 2161020294 is 4920201612.

2161020294 is a `hidden beast` number, since 2 + 1 + 610 + 20 + 29 + 4 = 666.

It is a super-2 number, since 2×2161020294² = 9340017422159692872, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161020293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60028324 + ... + 60028359.

It is an arithmetic number, because the mean of its divisors is an integer number (390184223).

Almost surely, 2^2161020294 is an apocalyptic number.

2161020294 is an abundant number, since it is smaller than the sum of its proper divisors (2521190382).

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

2161020294 is a wasteful number, since it uses less digits than its factorization.

2161020294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120056691 (or 120056688 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2161020294 is about 46486.7754743217. The cubic root of 2161020294 is about 1292.8643150166.

The spelling of 2161020294 in words is "two billion, one hundred sixty-one million, twenty thousand, two hundred ninety-four".