211406020 has 24 divisors (see below), whose sum is σ = 507374784. Its totient is φ = 72482016.

The previous prime is 211406003. The next prime is 211406021. The reversal of 211406020 is 20604112.

It is a junction number, because it is equal to n+sod(n) for n = 211405985 and 211406003.

It is not an unprimeable number, because it can be changed into a prime (211406021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 754882 + ... + 755161.

It is an arithmetic number, because the mean of its divisors is an integer number (21140616).

Almost surely, 2^211406020 is an apocalyptic number.

211406020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211406020 is an abundant number, since it is smaller than the sum of its proper divisors (295968764).

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

211406020 is a wasteful number, since it uses less digits than its factorization.

211406020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510059 (or 1510057 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 211406020 is about 14539.8081142772. The cubic root of 211406020 is about 595.7157969646.

It can be divided in two parts, 21 and 1406020, that added together give a palindrome (1406041).

The spelling of 211406020 in words is "two hundred eleven million, four hundred six thousand, twenty".