20415373765 has 8 divisors (see below), whose sum is σ = 24499886328. Its totient is φ = 16331340480.

The previous prime is 20415373747. The next prime is 20415373789. The reversal of 20415373765 is 56737351402.

It can be written as a sum of positive squares in 4 ways, for example, as 2239750276 + 18175623489 = 47326^2 + 134817^2 .

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

It is not a de Polignac number, because 20415373765 - 2¹³ = 20415365573 is a prime.

It is a Duffinian 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, 18282 + ... + 202891.

It is an arithmetic number, because the mean of its divisors is an integer number (3062485791).

Almost surely, 2^20415373765 is an apocalyptic number.

It is an amenable number.

20415373765 is a deficient number, since it is larger than the sum of its proper divisors (4084512563).

20415373765 is a wasteful number, since it uses less digits than its factorization.

20415373765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239639.

The product of its (nonzero) digits is 529200, while the sum is 43.

The spelling of 20415373765 in words is "twenty billion, four hundred fifteen million, three hundred seventy-three thousand, seven hundred sixty-five".