20687455330 has 16 divisors (see below), whose sum is σ = 37793203200. Its totient is φ = 8151474672.

The previous prime is 20687455309. The next prime is 20687455331. The reversal of 20687455330 is 3355478602.

It is not an unprimeable number, because it can be changed into a prime (20687455331) 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, 15437730 + ... + 15439069.

It is an arithmetic number, because the mean of its divisors is an integer number (2362075200).

Almost surely, 2^20687455330 is an apocalyptic number.

20687455330 is a deficient number, since it is larger than the sum of its proper divisors (17105747870).

20687455330 is a wasteful number, since it uses less digits than its factorization.

20687455330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30876873.

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 20687455330 in words is "twenty billion, six hundred eighty-seven million, four hundred fifty-five thousand, three hundred thirty".