18426156541 has 8 divisors (see below), whose sum is σ = 19988398584. Its totient is φ = 16884606720.

The previous prime is 18426156533. The next prime is 18426156587. The reversal of 18426156541 is 14565162481.

It can be written as a sum of positive squares in 4 ways, for example, as 134676025 + 18291480516 = 11605^2 + 135246^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18426156541 - 2³ = 18426156533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18426156041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5171200 + ... + 5174761.

It is an arithmetic number, because the mean of its divisors is an integer number (2498549823).

Almost surely, 2^18426156541 is an apocalyptic number.

It is an amenable number.

18426156541 is a deficient number, since it is larger than the sum of its proper divisors (1562242043).

18426156541 is a wasteful number, since it uses less digits than its factorization.

18426156541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10346111.

The product of its digits is 230400, while the sum is 43.

The spelling of 18426156541 in words is "eighteen billion, four hundred twenty-six million, one hundred fifty-six thousand, five hundred forty-one".