64020420011 has 16 divisors (see below), whose sum is σ = 65795600640. Its totient is φ = 62258686560.

The previous prime is 64020420001. The next prime is 64020420049. The reversal of 64020420011 is 11002402046.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64020420011 is a prime.

It is a super-2 number, since 2×64020420011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64020420001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19287410 + ... + 19290728.

It is an arithmetic number, because the mean of its divisors is an integer number (4112225040).

Almost surely, 2^64020420011 is an apocalyptic number.

64020420011 is a deficient number, since it is larger than the sum of its proper divisors (1775180629).

64020420011 is a wasteful number, since it uses less digits than its factorization.

64020420011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5186.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 64020420011 its reverse (11002402046), we get a palindrome (75022822057).

The spelling of 64020420011 in words is "sixty-four billion, twenty million, four hundred twenty thousand, eleven".