20651245307 has 8 divisors (see below), whose sum is σ = 25747007232. Its totient is φ = 16091879400.

The previous prime is 20651245291. The next prime is 20651245309. The reversal of 20651245307 is 70354215602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20651245307 - 2⁴ = 20651245291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20651245309) 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, 134098919 + ... + 134099072.

It is an arithmetic number, because the mean of its divisors is an integer number (3218375904).

Almost surely, 2^20651245307 is an apocalyptic number.

20651245307 is a deficient number, since it is larger than the sum of its proper divisors (5095761925).

20651245307 is a wasteful number, since it uses less digits than its factorization.

20651245307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268198009.

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 20651245307 in words is "twenty billion, six hundred fifty-one million, two hundred forty-five thousand, three hundred seven".