206430211453 has 4 divisors (see below), whose sum is σ = 206447841180. Its totient is φ = 206412581728.

The previous prime is 206430211451. The next prime is 206430211483. The reversal of 206430211453 is 354112034602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 354112034602 = 2 ⋅177056017301.

It can be written as a sum of positive squares in 2 ways, for example, as 28719064089 + 177711147364 = 169467^2 + 421558^2 .

It is a cyclic number.

It is not a de Polignac number, because 206430211453 - 2¹ = 206430211451 is a prime.

It is a super-2 number, since 2×206430211453² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206430211451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8797288 + ... + 8820721.

It is an arithmetic number, because the mean of its divisors is an integer number (51611960295).

Almost surely, 2^206430211453 is an apocalyptic number.

It is an amenable number.

206430211453 is a deficient number, since it is larger than the sum of its proper divisors (17629727).

206430211453 is a wasteful number, since it uses less digits than its factorization.

206430211453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17629726.

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 206430211453 in words is "two hundred six billion, four hundred thirty million, two hundred eleven thousand, four hundred fifty-three".