18072078056413 has 4 divisors (see below), whose sum is σ = 18077791647328. Its totient is φ = 18066364465500.

The previous prime is 18072078056401. The next prime is 18072078056437. The reversal of 18072078056413 is 31465087027081.

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-18072078056413 is a prime.

It is a super-2 number, since 2×18072078056413² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18072078056443) 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, 2856790713 + ... + 2856797038.

It is an arithmetic number, because the mean of its divisors is an integer number (4519447911832).

Almost surely, 2^{18072078056413} is an apocalyptic number.

It is an amenable number.

18072078056413 is a deficient number, since it is larger than the sum of its proper divisors (5713590915).

18072078056413 is an equidigital number, since it uses as much as digits as its factorization.

18072078056413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5713590914.

The product of its (nonzero) digits is 2257920, while the sum is 52.

The spelling of 18072078056413 in words is "eighteen trillion, seventy-two billion, seventy-eight million, fifty-six thousand, four hundred thirteen".