20275749983 has 4 divisors (see below), whose sum is σ = 20311384560. Its totient is φ = 20240115408.

The previous prime is 20275749979. The next prime is 20275750007. The reversal of 20275749983 is 38994757202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38994757202 = 2 ⋅19497378601.

It is a cyclic number.

It is not a de Polignac number, because 20275749983 - 2² = 20275749979 is a prime.

It is a super-2 number, since 2×20275749983² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20275749943) 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, 17816435 + ... + 17817572.

It is an arithmetic number, because the mean of its divisors is an integer number (5077846140).

Almost surely, 2^20275749983 is an apocalyptic number.

20275749983 is a deficient number, since it is larger than the sum of its proper divisors (35634577).

20275749983 is an equidigital number, since it uses as much as digits as its factorization.

20275749983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35634576.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 20275749983 in words is "twenty billion, two hundred seventy-five million, seven hundred forty-nine thousand, nine hundred eighty-three".