18422629749 has 24 divisors (see below), whose sum is σ = 27735598592. Its totient is φ = 11770155360.

The previous prime is 18422629721. The next prime is 18422629759. The reversal of 18422629749 is 94792622481.

It is a happy number.

18422629749 is a `hidden beast` number, since 1 + 8 + 4 + 2 + 2 + 629 + 7 + 4 + 9 = 666.

It is not a de Polignac number, because 18422629749 - 2¹⁶ = 18422564213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18422629695 and 18422629704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18422629759) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 291802 + ... + 349275.

Almost surely, 2^18422629749 is an apocalyptic number.

It is an amenable number.

18422629749 is a deficient number, since it is larger than the sum of its proper divisors (9312968843).

18422629749 is a wasteful number, since it uses less digits than its factorization.

18422629749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641217 (or 641214 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The spelling of 18422629749 in words is "eighteen billion, four hundred twenty-two million, six hundred twenty-nine thousand, seven hundred forty-nine".