206439920024 has 64 divisors (see below), whose sum is σ = 423888806880. Its totient is φ = 93672576000.

The previous prime is 206439920009. The next prime is 206439920081. The reversal of 206439920024 is 420029934602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15479039 + ... + 15492369.

Almost surely, 2^206439920024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206439920024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211944403440).

206439920024 is an abundant number, since it is smaller than the sum of its proper divisors (217448886856).

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

206439920024 is a wasteful number, since it uses less digits than its factorization.

206439920024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15852 (or 15848 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 206439920024 in words is "two hundred six billion, four hundred thirty-nine million, nine hundred twenty thousand, twenty-four".