210320142020 has 24 divisors (see below), whose sum is σ = 467653022424. Its totient is φ = 79179347456.

The previous prime is 210320142017. The next prime is 210320142047. The reversal of 210320142020 is 20241023012.

It can be written as a sum of positive squares in 4 ways, for example, as 66794334916 + 143525807104 = 258446^2 + 378848^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 210320142020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309293987 + ... + 309294666.

It is an arithmetic number, because the mean of its divisors is an integer number (19485542601).

Almost surely, 2^210320142020 is an apocalyptic number.

210320142020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210320142020 is an abundant number, since it is smaller than the sum of its proper divisors (257332880404).

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

210320142020 is a wasteful number, since it uses less digits than its factorization.

210320142020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618588679 (or 618588677 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 210320142020 its reverse (20241023012), we get a palindrome (230561165032).

The spelling of 210320142020 in words is "two hundred ten billion, three hundred twenty million, one hundred forty-two thousand, twenty".