20013653450407 has 4 divisors (see below), whose sum is σ = 20219979774736. Its totient is φ = 19807327126080.

The previous prime is 20013653450333. The next prime is 20013653450423. The reversal of 20013653450407 is 70405435631002.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013653450407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20013653450407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013653450447) 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, 103163162019 + ... + 103163162212.

It is an arithmetic number, because the mean of its divisors is an integer number (5054994943684).

Almost surely, 2^{20013653450407} is an apocalyptic number.

20013653450407 is a deficient number, since it is larger than the sum of its proper divisors (206326324329).

20013653450407 is an equidigital number, since it uses as much as digits as its factorization.

20013653450407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206326324328.

The product of its (nonzero) digits is 302400, while the sum is 40.

The spelling of 20013653450407 in words is "twenty trillion, thirteen billion, six hundred fifty-three million, four hundred fifty thousand, four hundred seven".