20378763 has 24 divisors (see below), whose sum is σ = 31014000. Its totient is φ = 13224960.

The previous prime is 20378747. The next prime is 20378779. The reversal of 20378763 is 36787302.

It is an interprime number because it is at equal distance from previous prime (20378747) and next prime (20378779).

It is not a de Polignac number, because 20378763 - 2⁴ = 20378747 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20378723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45163 + ... + 45611.

It is an arithmetic number, because the mean of its divisors is an integer number (1292250).

Almost surely, 2^20378763 is an apocalyptic number.

20378763 is a deficient number, since it is larger than the sum of its proper divisors (10635237).

20378763 is an equidigital number, since it uses as much as digits as its factorization.

20378763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 20378763 is about 4514.2843286616. The cubic root of 20378763 is about 273.1445919230.

The spelling of 20378763 in words is "twenty million, three hundred seventy-eight thousand, seven hundred sixty-three".