20294513786 has 4 divisors (see below), whose sum is σ = 30441770682. Its totient is φ = 10147256892.

The previous prime is 20294513779. The next prime is 20294513807. The reversal of 20294513786 is 68731549202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11471481025 + 8823032761 = 107105^2 + 93931^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20294513786.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5073628445 + ... + 5073628448.

It is a 1-persistent number, because it is pandigital, but 2⋅20294513786 = 40589027572 is not.

Almost surely, 2^20294513786 is an apocalyptic number.

20294513786 is a deficient number, since it is larger than the sum of its proper divisors (10147256896).

20294513786 is a wasteful number, since it uses less digits than its factorization.

20294513786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10147256895.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 20294513786 in words is "twenty billion, two hundred ninety-four million, five hundred thirteen thousand, seven hundred eighty-six".