20802608307 has 24 divisors (see below), whose sum is σ = 32438806400. Its totient is φ = 12770275968.

The previous prime is 20802608303. The next prime is 20802608353. The reversal of 20802608307 is 70380620802.

It is a happy number.

It is not a de Polignac number, because 20802608307 - 2² = 20802608303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20802608303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169507 + ... + 265212.

Almost surely, 2^20802608307 is an apocalyptic number.

20802608307 is a deficient number, since it is larger than the sum of its proper divisors (11636198093).

20802608307 is a wasteful number, since it uses less digits than its factorization.

20802608307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435147 (or 435144 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 20802608307 in words is "twenty billion, eight hundred two million, six hundred eight thousand, three hundred seven".