20193814737 has 6 divisors (see below), whose sum is σ = 29168843522. Its totient is φ = 13462543152.

The previous prime is 20193814733. The next prime is 20193814793. The reversal of 20193814737 is 73741839102.

It can be written as a sum of positive squares in only one way, i.e., 16954383681 + 3239431056 = 130209^2 + 56916^2 .

It is not a de Polignac number, because 20193814737 - 2² = 20193814733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20193814692 and 20193814701.

It is not an unprimeable number, because it can be changed into a prime (20193814733) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1121878588 + ... + 1121878605.

Almost surely, 2^20193814737 is an apocalyptic number.

It is an amenable number.

20193814737 is a deficient number, since it is larger than the sum of its proper divisors (8975028785).

20193814737 is a wasteful number, since it uses less digits than its factorization.

20193814737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243757199 (or 2243757196 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 20193814737 in words is "twenty billion, one hundred ninety-three million, eight hundred fourteen thousand, seven hundred thirty-seven".