20602423705 has 4 divisors (see below), whose sum is σ = 24722908452. Its totient is φ = 16481938960.

The previous prime is 20602423669. The next prime is 20602423733. The reversal of 20602423705 is 50732420602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6072773184 + 14529650521 = 77928^2 + 120539^2 .

It is not a de Polignac number, because 20602423705 - 2¹⁵ = 20602390937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2060242366 + ... + 2060242375.

It is an arithmetic number, because the mean of its divisors is an integer number (6180727113).

Almost surely, 2^20602423705 is an apocalyptic number.

It is an amenable number.

20602423705 is a deficient number, since it is larger than the sum of its proper divisors (4120484747).

20602423705 is an equidigital number, since it uses as much as digits as its factorization.

20602423705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4120484746.

The product of its (nonzero) digits is 20160, while the sum is 31.

The spelling of 20602423705 in words is "twenty billion, six hundred two million, four hundred twenty-three thousand, seven hundred five".