20880076785 has 16 divisors (see below), whose sum is σ = 33410316480. Its totient is φ = 11135309760.

The previous prime is 20880076781. The next prime is 20880076799. The reversal of 20880076785 is 58767008802.

It is not a de Polignac number, because 20880076785 - 2² = 20880076781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20880076781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253590 + ... + 325680.

It is an arithmetic number, because the mean of its divisors is an integer number (2088144780).

Almost surely, 2^20880076785 is an apocalyptic number.

It is an amenable number.

20880076785 is a deficient number, since it is larger than the sum of its proper divisors (12530239695).

20880076785 is a wasteful number, since it uses less digits than its factorization.

20880076785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91408.

The product of its (nonzero) digits is 1505280, while the sum is 51.

The spelling of 20880076785 in words is "twenty billion, eight hundred eighty million, seventy-six thousand, seven hundred eighty-five".