20193934836 has 96 divisors (see below), whose sum is σ = 49634726400. Its totient is φ = 6383180800.

The previous prime is 20193934819. The next prime is 20193934909. The reversal of 20193934836 is 63843939102.

It is a happy number.

It is a super-2 number, since 2×20193934836² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3442546 + ... + 3448406.

It is an arithmetic number, because the mean of its divisors is an integer number (517028400).

Almost surely, 2^20193934836 is an apocalyptic number.

It is an amenable number.

20193934836 is an abundant number, since it is smaller than the sum of its proper divisors (29440791564).

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

20193934836 is a wasteful number, since it uses less digits than its factorization.

20193934836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6105 (or 6103 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 48.

The spelling of 20193934836 in words is "twenty billion, one hundred ninety-three million, nine hundred thirty-four thousand, eight hundred thirty-six".