2105421054 has 64 divisors (see below), whose sum is σ = 4791847680. Its totient is φ = 615938400.

The previous prime is 2105421047. The next prime is 2105421139. The reversal of 2105421054 is 4501245012.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227049 + ... + 236139.

It is an arithmetic number, because the mean of its divisors is an integer number (74872620).

Almost surely, 2^2105421054 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2105421054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2395923840).

2105421054 is an abundant number, since it is smaller than the sum of its proper divisors (2686426626).

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

2105421054 is a wasteful number, since it uses less digits than its factorization.

2105421054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9158 (or 9136 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 2105421054 is about 45884.8673747675. The cubic root of 2105421054 is about 1281.6801370185.

Adding to 2105421054 its reverse (4501245012), we get a palindrome (6606666066).

The spelling of 2105421054 in words is "two billion, one hundred five million, four hundred twenty-one thousand, fifty-four".