20208842646 has 32 divisors (see below), whose sum is σ = 40556505600. Its totient is φ = 6713180640.

The previous prime is 20208842629. The next prime is 20208842657. The reversal of 20208842646 is 64624880202.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20208842598 and 20208842607.

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, 2631300 + ... + 2638968.

It is an arithmetic number, because the mean of its divisors is an integer number (1267390800).

Almost surely, 2^20208842646 is an apocalyptic number.

20208842646 is an abundant number, since it is smaller than the sum of its proper divisors (20347662954).

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

20208842646 is a wasteful number, since it uses less digits than its factorization.

20208842646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9124.

The product of its (nonzero) digits is 294912, while the sum is 42.

The spelling of 20208842646 in words is "twenty billion, two hundred eight million, eight hundred forty-two thousand, six hundred forty-six".