20388890759470 has 16 divisors (see below), whose sum is σ = 36700858046160. Its totient is φ = 8155366375104.

The previous prime is 20388890759449. The next prime is 20388890759473. The reversal of 20388890759470 is 7495709888302.

It is a self number, because there is not a number n which added to its sum of digits gives 20388890759470.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20388890759473) 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, 23289807 + ... + 24149386.

It is an arithmetic number, because the mean of its divisors is an integer number (2293803627885).

Almost surely, 2^{20388890759470} is an apocalyptic number.

20388890759470 is a deficient number, since it is larger than the sum of its proper divisors (16311967286690).

20388890759470 is a wasteful number, since it uses less digits than its factorization.

20388890759470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47482179.

The product of its (nonzero) digits is 243855360, while the sum is 70.

The spelling of 20388890759470 in words is "twenty trillion, three hundred eighty-eight billion, eight hundred ninety million, seven hundred fifty-nine thousand, four hundred seventy".