20378465305 has 8 divisors (see below), whose sum is σ = 26677263744. Its totient is φ = 14820702000.

The previous prime is 20378465269. The next prime is 20378465309. The reversal of 20378465305 is 50356487302.

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

It is not a de Polignac number, because 20378465305 - 2⁹ = 20378464793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20378465309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185258721 + ... + 185258830.

It is an arithmetic number, because the mean of its divisors is an integer number (3334657968).

Almost surely, 2^20378465305 is an apocalyptic number.

It is an amenable number.

20378465305 is a deficient number, since it is larger than the sum of its proper divisors (6298798439).

20378465305 is a wasteful number, since it uses less digits than its factorization.

20378465305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370517567.

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 20378465305 in words is "twenty billion, three hundred seventy-eight million, four hundred sixty-five thousand, three hundred five".