210042302420 has 48 divisors (see below), whose sum is σ = 445502683920. Its totient is φ = 83180058624.

The previous prime is 210042302411. The next prime is 210042302441. The reversal of 210042302420 is 24203240012.

It can be written as a sum of positive squares in 8 ways, for example, as 52048772164 + 157993530256 = 228142^2 + 397484^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 210042302392 and 210042302401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 749036 + ... + 990524.

It is an arithmetic number, because the mean of its divisors is an integer number (9281305915).

Almost surely, 2^210042302420 is an apocalyptic number.

210042302420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210042302420 is an abundant number, since it is smaller than the sum of its proper divisors (235460381500).

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

210042302420 is a wasteful number, since it uses less digits than its factorization.

210042302420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241932 (or 241930 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 210042302420 its reverse (24203240012), we get a palindrome (234245542432).

The spelling of 210042302420 in words is "two hundred ten billion, forty-two million, three hundred two thousand, four hundred twenty".