20425841765 has 16 divisors (see below), whose sum is σ = 28471808640. Its totient is φ = 13776678720.

The previous prime is 20425841743. The next prime is 20425841797. The reversal of 20425841765 is 56714852402.

It is not a de Polignac number, because 20425841765 - 2⁸ = 20425841509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4781435 + ... + 4785704.

It is an arithmetic number, because the mean of its divisors is an integer number (1779488040).

Almost surely, 2^20425841765 is an apocalyptic number.

It is an amenable number.

20425841765 is a deficient number, since it is larger than the sum of its proper divisors (8045966875).

20425841765 is an equidigital number, since it uses as much as digits as its factorization.

20425841765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9567212.

The product of its (nonzero) digits is 537600, while the sum is 44.

The spelling of 20425841765 in words is "twenty billion, four hundred twenty-five million, eight hundred forty-one thousand, seven hundred sixty-five".