20411557973 has 8 divisors (see below), whose sum is σ = 21276108192. Its totient is φ = 19563475536.

The previous prime is 20411557963. The next prime is 20411558009. The reversal of 20411557973 is 37975511402.

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 20411557973 - 2²⁰ = 20410509397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20411557913) 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, 4114415 + ... + 4119372.

It is an arithmetic number, because the mean of its divisors is an integer number (2659513524).

Almost surely, 2^20411557973 is an apocalyptic number.

It is an amenable number.

20411557973 is a deficient number, since it is larger than the sum of its proper divisors (864550219).

20411557973 is an equidigital number, since it uses as much as digits as its factorization.

20411557973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8233891.

The product of its (nonzero) digits is 264600, while the sum is 44.

The spelling of 20411557973 in words is "twenty billion, four hundred eleven million, five hundred fifty-seven thousand, nine hundred seventy-three".