13500420645 has 16 divisors (see below), whose sum is σ = 22737551040. Its totient is φ = 6821265024.

The previous prime is 13500420643. The next prime is 13500420691. The reversal of 13500420645 is 54602400531.

It is not a de Polignac number, because 13500420645 - 2¹ = 13500420643 is a prime.

It is a super-2 number, since 2×13500420645² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13500420643) 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, 23684664 + ... + 23685233.

It is an arithmetic number, because the mean of its divisors is an integer number (1421096940).

Almost surely, 2^13500420645 is an apocalyptic number.

13500420645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13500420645 is a deficient number, since it is larger than the sum of its proper divisors (9237130395).

13500420645 is a wasteful number, since it uses less digits than its factorization.

13500420645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47369924.

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 13500420645 in words is "thirteen billion, five hundred million, four hundred twenty thousand, six hundred forty-five".