18738459051 has 16 divisors (see below), whose sum is σ = 27774458880. Its totient is φ = 11159379360.

The previous prime is 18738459037. The next prime is 18738459079. The reversal of 18738459051 is 15095483781.

It is not a de Polignac number, because 18738459051 - 2¹⁹ = 18737934763 is a prime.

It is a super-2 number, since 2×18738459051² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18738458985 and 18738459003.

It is not an unprimeable number, because it can be changed into a prime (18738459251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7748361 + ... + 7750778.

It is an arithmetic number, because the mean of its divisors is an integer number (1735903680).

Almost surely, 2^18738459051 is an apocalyptic number.

18738459051 is a deficient number, since it is larger than the sum of its proper divisors (9035999829).

18738459051 is a wasteful number, since it uses less digits than its factorization.

18738459051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15499186.

The product of its (nonzero) digits is 1209600, while the sum is 51.

The spelling of 18738459051 in words is "eighteen billion, seven hundred thirty-eight million, four hundred fifty-nine thousand, fifty-one".