2161027420 has 24 divisors (see below), whose sum is σ = 4805108784. Its totient is φ = 813563136.

The previous prime is 2161027417. The next prime is 2161027457. The reversal of 2161027420 is 247201612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3177642 + ... + 3178321.

It is an arithmetic number, because the mean of its divisors is an integer number (200212866).

Almost surely, 2^2161027420 is an apocalyptic number.

2161027420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2161027420 is an abundant number, since it is smaller than the sum of its proper divisors (2644081364).

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

2161027420 is a wasteful number, since it uses less digits than its factorization.

2161027420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6355989 (or 6355987 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 2161027420 is about 46486.8521197123. The cubic root of 2161027420 is about 1292.8657360955.

The spelling of 2161027420 in words is "two billion, one hundred sixty-one million, twenty-seven thousand, four hundred twenty".