206906920704 has 216 divisors, whose sum is σ = 655931308032. Its totient is φ = 62204405760.

The previous prime is 206906920697. The next prime is 206906920709. The reversal of 206906920704 is 407029609602.

It is a super-2 number, since 2×206906920704² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 206906920704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206906920709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3186547 + ... + 3250829.

Almost surely, 2^206906920704 is an apocalyptic number.

206906920704 is a gapful number since it is divisible by the number (24) 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 206906920704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327965654016).

206906920704 is an abundant number, since it is smaller than the sum of its proper divisors (449024387328).

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

206906920704 is a wasteful number, since it uses less digits than its factorization.

206906920704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64443 (or 64426 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 206906920704 in words is "two hundred six billion, nine hundred six million, nine hundred twenty thousand, seven hundred four".