210440012430420 has 240 divisors, whose sum is σ = 661281654633600. Its totient is φ = 56021875672320.

The previous prime is 210440012430397. The next prime is 210440012430449. The reversal of 210440012430420 is 24034210044012.

210440012430420 is a `hidden beast` number, since 2 + 10 + 4 + 400 + 1 + 243 + 0 + 4 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4239383961 + ... + 4239433599.

It is an arithmetic number, because the mean of its divisors is an integer number (2755340227640).

Almost surely, 2^{210440012430420} is an apocalyptic number.

210440012430420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210440012430420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330640827316800).

210440012430420 is an abundant number, since it is smaller than the sum of its proper divisors (450841642203180).

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

210440012430420 is a wasteful number, since it uses less digits than its factorization.

210440012430420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54060 (or 54049 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 210440012430420 its reverse (24034210044012), we get a palindrome (234474222474432).

The spelling of 210440012430420 in words is "two hundred ten trillion, four hundred forty billion, twelve million, four hundred thirty thousand, four hundred twenty".