20475745339 has 16 divisors (see below), whose sum is σ = 23470997760. Its totient is φ = 17498103840.

The previous prime is 20475745337. The next prime is 20475745363. The reversal of 20475745339 is 93354757402.

It is not a de Polignac number, because 20475745339 - 2¹ = 20475745337 is a prime.

It is a super-2 number, since 2×20475745339² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20475745292 and 20475745301.

It is not an unprimeable number, because it can be changed into a prime (20475745337) 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, 4716832 + ... + 4721170.

It is an arithmetic number, because the mean of its divisors is an integer number (1466937360).

Almost surely, 2^20475745339 is an apocalyptic number.

20475745339 is a deficient number, since it is larger than the sum of its proper divisors (2995252421).

20475745339 is a wasteful number, since it uses less digits than its factorization.

20475745339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6210.

The product of its (nonzero) digits is 3175200, while the sum is 49.

The spelling of 20475745339 in words is "twenty billion, four hundred seventy-five million, seven hundred forty-five thousand, three hundred thirty-nine".