20520079723 has 8 divisors (see below), whose sum is σ = 24107506416. Its totient is φ = 17219647200.

The previous prime is 20520079711. The next prime is 20520079739. The reversal of 20520079723 is 32797002502.

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 20520079723 - 2¹³ = 20520071531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20520079703) 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, 71748388 + ... + 71748673.

It is an arithmetic number, because the mean of its divisors is an integer number (3013438302).

Almost surely, 2^20520079723 is an apocalyptic number.

20520079723 is a deficient number, since it is larger than the sum of its proper divisors (3587426693).

20520079723 is a wasteful number, since it uses less digits than its factorization.

20520079723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143497085.

The product of its (nonzero) digits is 52920, while the sum is 37.

The spelling of 20520079723 in words is "twenty billion, five hundred twenty million, seventy-nine thousand, seven hundred twenty-three".