18726748405 has 16 divisors (see below), whose sum is σ = 23258638080. Its totient is φ = 14457556288.

The previous prime is 18726748387. The next prime is 18726748421. The reversal of 18726748405 is 50484762781.

It is a cyclic number.

It is not a de Polignac number, because 18726748405 - 2¹⁷ = 18726617333 is a prime.

It is a super-2 number, since 2×18726748405² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267834 + ... + 330436.

It is an arithmetic number, because the mean of its divisors is an integer number (1453664880).

Almost surely, 2^18726748405 is an apocalyptic number.

It is an amenable number.

18726748405 is a deficient number, since it is larger than the sum of its proper divisors (4531889675).

18726748405 is a wasteful number, since it uses less digits than its factorization.

18726748405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64700.

The product of its (nonzero) digits is 3010560, while the sum is 52.

The spelling of 18726748405 in words is "eighteen billion, seven hundred twenty-six million, seven hundred forty-eight thousand, four hundred five".