2026581381 has 12 divisors (see below), whose sum is σ = 3193401120. Its totient is φ = 1228231080.

The previous prime is 2026581331. The next prime is 2026581409. The reversal of 2026581381 is 1831856202.

It is a happy number.

2026581381 is a `hidden beast` number, since 20 + 26 + 581 + 38 + 1 = 666.

2026581381 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2026581381 - 2¹⁵ = 2026548613 is a prime.

It is a super-2 number, since 2×2026581381² = 8214064187631734322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2026581331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10235161 + ... + 10235358.

It is an arithmetic number, because the mean of its divisors is an integer number (266116760).

Almost surely, 2^2026581381 is an apocalyptic number.

It is an amenable number.

2026581381 is a deficient number, since it is larger than the sum of its proper divisors (1166819739).

2026581381 is a wasteful number, since it uses less digits than its factorization.

2026581381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20470536 (or 20470533 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 2026581381 is about 45017.5674709329. The cubic root of 2026581381 is about 1265.4782427290.

The spelling of 2026581381 in words is "two billion, twenty-six million, five hundred eighty-one thousand, three hundred eighty-one".