20295791765 has 8 divisors (see below), whose sum is σ = 24367692888. Its totient is φ = 16228138240.

The previous prime is 20295791759. The next prime is 20295791771. The reversal of 20295791765 is 56719759202.

It is an interprime number because it is at equal distance from previous prime (20295791759) and next prime (20295791771).

It can be written as a sum of positive squares in 4 ways, for example, as 10374237316 + 9921554449 = 101854^2 + 99607^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20295791765 - 2⁴ = 20295791749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1051376 + ... + 1070505.

It is an arithmetic number, because the mean of its divisors is an integer number (3045961611).

Almost surely, 2^20295791765 is an apocalyptic number.

It is an amenable number.

20295791765 is a deficient number, since it is larger than the sum of its proper divisors (4071901123).

20295791765 is a wasteful number, since it uses less digits than its factorization.

20295791765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123799.

The product of its (nonzero) digits is 2381400, while the sum is 53.

The spelling of 20295791765 in words is "twenty billion, two hundred ninety-five million, seven hundred ninety-one thousand, seven hundred sixty-five".