2061854638 has 8 divisors (see below), whose sum is σ = 3093008688. Its totient is φ = 1030851744.

The previous prime is 2061854623. The next prime is 2061854647. The reversal of 2061854638 is 8364581602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2061854638² = 8502489096484222088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2061854594 and 2061854603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6870 + ... + 64582.

It is an arithmetic number, because the mean of its divisors is an integer number (386626086).

Almost surely, 2^2061854638 is an apocalyptic number.

2061854638 is a deficient number, since it is larger than the sum of its proper divisors (1031154050).

2061854638 is a wasteful number, since it uses less digits than its factorization.

2061854638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75578.

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 2061854638 is about 45407.6495537921. The cubic root of 2061854638 is about 1272.7780627811.

The spelling of 2061854638 in words is "two billion, sixty-one million, eight hundred fifty-four thousand, six hundred thirty-eight".