20540776033921 has 32 divisors (see below), whose sum is σ = 24195186892800. Its totient is φ = 17191811407680.

The previous prime is 20540776033919. The next prime is 20540776033961. The reversal of 20540776033921 is 12933067704502.

It is not a de Polignac number, because 20540776033921 - 2¹ = 20540776033919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20540776033961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85352800 + ... + 85593118.

It is an arithmetic number, because the mean of its divisors is an integer number (756099590400).

Almost surely, 2^{20540776033921} is an apocalyptic number.

It is an amenable number.

20540776033921 is a deficient number, since it is larger than the sum of its proper divisors (3654410858879).

20540776033921 is a wasteful number, since it uses less digits than its factorization.

20540776033921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241909.

The product of its (nonzero) digits is 1905120, while the sum is 49.

The spelling of 20540776033921 in words is "twenty trillion, five hundred forty billion, seven hundred seventy-six million, thirty-three thousand, nine hundred twenty-one".