18426156542 has 16 divisors (see below), whose sum is σ = 28121914800. Its totient is φ = 9052343040.

The previous prime is 18426156533. The next prime is 18426156587. The reversal of 18426156542 is 24565162481.

It is a junction number, because it is equal to n+sod(n) for n = 18426156493 and 18426156502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200942 + ... + 277902.

It is an arithmetic number, because the mean of its divisors is an integer number (1757619675).

Almost surely, 2^18426156542 is an apocalyptic number.

18426156542 is a deficient number, since it is larger than the sum of its proper divisors (9695758258).

18426156542 is a wasteful number, since it uses less digits than its factorization.

18426156542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79051.

The product of its digits is 460800, while the sum is 44.

The spelling of 18426156542 in words is "eighteen billion, four hundred twenty-six million, one hundred fifty-six thousand, five hundred forty-two".