20540654070051 has 4 divisors (see below), whose sum is σ = 27387538760072. Its totient is φ = 13693769380032.

The previous prime is 20540654070043. The next prime is 20540654070067. The reversal of 20540654070051 is 15007045604502.

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

It is not a de Polignac number, because 20540654070051 - 2³ = 20540654070043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20540654069991 and 20540654070009.

It is not an unprimeable number, because it can be changed into a prime (20540654070031) 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, 3423442345006 + ... + 3423442345011.

It is an arithmetic number, because the mean of its divisors is an integer number (6846884690018).

Almost surely, 2^{20540654070051} is an apocalyptic number.

20540654070051 is a deficient number, since it is larger than the sum of its proper divisors (6846884690021).

20540654070051 is an equidigital number, since it uses as much as digits as its factorization.

20540654070051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6846884690020.

The product of its (nonzero) digits is 168000, while the sum is 39.

Adding to 20540654070051 its reverse (15007045604502), we get a palindrome (35547699674553).

The spelling of 20540654070051 in words is "twenty trillion, five hundred forty billion, six hundred fifty-four million, seventy thousand, fifty-one".