20952509707 has 4 divisors (see below), whose sum is σ = 22185010296. Its totient is φ = 19720009120.

The previous prime is 20952509689. The next prime is 20952509731. The reversal of 20952509707 is 70790525902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20952509707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20952509507) 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 3 ways as a sum of consecutive naturals, for example, 616250269 + ... + 616250302.

It is an arithmetic number, because the mean of its divisors is an integer number (5546252574).

Almost surely, 2^20952509707 is an apocalyptic number.

20952509707 is a deficient number, since it is larger than the sum of its proper divisors (1232500589).

20952509707 is a wasteful number, since it uses less digits than its factorization.

20952509707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232500588.

The product of its (nonzero) digits is 396900, while the sum is 46.

The spelling of 20952509707 in words is "twenty billion, nine hundred fifty-two million, five hundred nine thousand, seven hundred seven".