20637530707 has 8 divisors (see below), whose sum is σ = 21305850752. Its totient is φ = 19969372800.

The previous prime is 20637530699. The next prime is 20637530731. The reversal of 20637530707 is 70703573602.

It is a happy number.

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 20637530707 - 2³ = 20637530699 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20637530707.

It is not an unprimeable number, because it can be changed into a prime (20637530747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251707 + ... + 323467.

It is an arithmetic number, because the mean of its divisors is an integer number (2663231344).

Almost surely, 2^20637530707 is an apocalyptic number.

20637530707 is a deficient number, since it is larger than the sum of its proper divisors (668320045).

20637530707 is an equidigital number, since it uses as much as digits as its factorization.

20637530707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81069.

The product of its (nonzero) digits is 185220, while the sum is 40.

The spelling of 20637530707 in words is "twenty billion, six hundred thirty-seven million, five hundred thirty thousand, seven hundred seven".