20540500601 has 4 divisors (see below), whose sum is σ = 21621579600. Its totient is φ = 19459421604.

The previous prime is 20540500517. The next prime is 20540500619. The reversal of 20540500601 is 10600504502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20540500601 is a prime.

It is a super-2 number, since 2×20540500601² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20540500691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540539471 + ... + 540539508.

It is an arithmetic number, because the mean of its divisors is an integer number (5405394900).

Almost surely, 2^20540500601 is an apocalyptic number.

It is an amenable number.

20540500601 is a deficient number, since it is larger than the sum of its proper divisors (1081078999).

20540500601 is a wasteful number, since it uses less digits than its factorization.

20540500601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081078998.

The product of its (nonzero) digits is 1200, while the sum is 23.

The spelling of 20540500601 in words is "twenty billion, five hundred forty million, five hundred thousand, six hundred one".