20747031733 has 4 divisors (see below), whose sum is σ = 20805805548. Its totient is φ = 20688257920.

The previous prime is 20747031713. The next prime is 20747031787. The reversal of 20747031733 is 33713074702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33713074702 = 2 ⋅16856537351.

It can be written as a sum of positive squares in 2 ways, for example, as 2694959569 + 18052072164 = 51913^2 + 134358^2 .

It is a cyclic number.

It is not a de Polignac number, because 20747031733 - 2¹³ = 20747023541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20747031692 and 20747031701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20747031713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29386378 + ... + 29387083.

It is an arithmetic number, because the mean of its divisors is an integer number (5201451387).

Almost surely, 2^20747031733 is an apocalyptic number.

It is an amenable number.

20747031733 is a deficient number, since it is larger than the sum of its proper divisors (58773815).

20747031733 is an equidigital number, since it uses as much as digits as its factorization.

20747031733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58773814.

The product of its (nonzero) digits is 74088, while the sum is 37.

The spelling of 20747031733 in words is "twenty billion, seven hundred forty-seven million, thirty-one thousand, seven hundred thirty-three".