210206642140 has 48 divisors (see below), whose sum is σ = 481595466240. Its totient is φ = 76433833280.

The previous prime is 210206642131. The next prime is 210206642143. The reversal of 210206642140 is 41246602012.

It is a junction number, because it is equal to n+sod(n) for n = 210206642099 and 210206642108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210206642143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6769089 + ... + 6800071.

It is an arithmetic number, because the mean of its divisors is an integer number (10033238880).

Almost surely, 2^210206642140 is an apocalyptic number.

210206642140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210206642140 is an abundant number, since it is smaller than the sum of its proper divisors (271388824100).

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

210206642140 is a wasteful number, since it uses less digits than its factorization.

210206642140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61842 (or 61840 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The spelling of 210206642140 in words is "two hundred ten billion, two hundred six million, six hundred forty-two thousand, one hundred forty".