206426405420 has 24 divisors (see below), whose sum is σ = 436091239584. Its totient is φ = 82076126336.

The previous prime is 206426405399. The next prime is 206426405429. The reversal of 206426405420 is 24504624602.

It is a super-2 number, since 2×206426405420² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206426405429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30898817 + ... + 30905496.

It is an arithmetic number, because the mean of its divisors is an integer number (18170468316).

Almost surely, 2^206426405420 is an apocalyptic number.

206426405420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206426405420 is an abundant number, since it is smaller than the sum of its proper divisors (229664834164).

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

206426405420 is a wasteful number, since it uses less digits than its factorization.

206426405420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61804489 (or 61804487 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 35.

The spelling of 206426405420 in words is "two hundred six billion, four hundred twenty-six million, four hundred five thousand, four hundred twenty".