2106820438 has 16 divisors (see below), whose sum is σ = 3347676864. Its totient is φ = 990985600.

The previous prime is 2106820433. The next prime is 2106820483. The reversal of 2106820438 is 8340286012.

It is a super-3 number, since 3×2106820438³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106820433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66756 + ... + 93112.

It is an arithmetic number, because the mean of its divisors is an integer number (209229804).

Almost surely, 2^2106820438 is an apocalyptic number.

2106820438 is a deficient number, since it is larger than the sum of its proper divisors (1240856426).

2106820438 is a wasteful number, since it uses less digits than its factorization.

2106820438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28727.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 2106820438 is about 45900.1137035629. The cubic root of 2106820438 is about 1281.9640335898.

The spelling of 2106820438 in words is "two billion, one hundred six million, eight hundred twenty thousand, four hundred thirty-eight".