39720922205 has 4 divisors (see below), whose sum is σ = 47665106652. Its totient is φ = 31776737760.

The previous prime is 39720922193. The next prime is 39720922223. The reversal of 39720922205 is 50222902793.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19018892281 + 20702029924 = 137909^2 + 143882^2 .

It is not a de Polignac number, because 39720922205 - 2²⁰ = 39719873629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3972092216 + ... + 3972092225.

It is an arithmetic number, because the mean of its divisors is an integer number (11916276663).

Almost surely, 2^39720922205 is an apocalyptic number.

It is an amenable number.

39720922205 is a deficient number, since it is larger than the sum of its proper divisors (7944184447).

39720922205 is an equidigital number, since it uses as much as digits as its factorization.

39720922205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7944184446.

The product of its (nonzero) digits is 136080, while the sum is 41.

The spelling of 39720922205 in words is "thirty-nine billion, seven hundred twenty million, nine hundred twenty-two thousand, two hundred five".