20995353707 has 4 divisors (see below), whose sum is σ = 21069542520. Its totient is φ = 20921164896.

The previous prime is 20995353671. The next prime is 20995353721. The reversal of 20995353707 is 70735359902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70735359902 = 2 ⋅35367679951.

It is a cyclic number.

It is not a de Polignac number, because 20995353707 - 2²² = 20991159403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20995353767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37093982 + ... + 37094547.

It is an arithmetic number, because the mean of its divisors is an integer number (5267385630).

Almost surely, 2^20995353707 is an apocalyptic number.

20995353707 is a deficient number, since it is larger than the sum of its proper divisors (74188813).

20995353707 is an equidigital number, since it uses as much as digits as its factorization.

20995353707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74188812.

The product of its (nonzero) digits is 1786050, while the sum is 50.

The spelling of 20995353707 in words is "twenty billion, nine hundred ninety-five million, three hundred fifty-three thousand, seven hundred seven".