20385510776 has 16 divisors (see below), whose sum is σ = 38224554000. Its totient is φ = 10192296384.

The previous prime is 20385510731. The next prime is 20385510779. The reversal of 20385510776 is 67701558302.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20385510779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198500 + ... + 283148.

It is an arithmetic number, because the mean of its divisors is an integer number (2389034625).

Almost surely, 2^20385510776 is an apocalyptic number.

It is an amenable number.

20385510776 is a deficient number, since it is larger than the sum of its proper divisors (17839043224).

20385510776 is a wasteful number, since it uses less digits than its factorization.

20385510776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114758 (or 114754 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 20385510776 in words is "twenty billion, three hundred eighty-five million, five hundred ten thousand, seven hundred seventy-six".