206430420 has 48 divisors (see below), whose sum is σ = 660578688. Its totient is φ = 47184000.

The previous prime is 206430409. The next prime is 206430481. The reversal of 206430420 is 24034602.

206430420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×206430420² = 85227036602752800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 245331 + ... + 246170.

It is an arithmetic number, because the mean of its divisors is an integer number (13762056).

Almost surely, 2^206430420 is an apocalyptic number.

206430420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206430420 is an abundant number, since it is smaller than the sum of its proper divisors (454148268).

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

206430420 is a wasteful number, since it uses less digits than its factorization.

206430420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491520 (or 491518 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 206430420 is about 14367.6866613940. The cubic root of 206430420 is about 591.0051047283.

The spelling of 206430420 in words is "two hundred six million, four hundred thirty thousand, four hundred twenty".