20208194436 has 48 divisors (see below), whose sum is σ = 47991581120. Its totient is φ = 6616494720.

The previous prime is 20208194359. The next prime is 20208194437. The reversal of 20208194436 is 63449180202.

It is a super-2 number, since 2×20208194436² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20208194394 and 20208194403.

It is not an unprimeable number, because it can be changed into a prime (20208194437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522270 + ... + 559626.

Almost surely, 2^20208194436 is an apocalyptic number.

It is an amenable number.

20208194436 is an abundant number, since it is smaller than the sum of its proper divisors (27783386684).

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

20208194436 is a wasteful number, since it uses less digits than its factorization.

20208194436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38164 (or 38162 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 20208194436 in words is "twenty billion, two hundred eight million, one hundred ninety-four thousand, four hundred thirty-six".