18905724051 has 8 divisors (see below), whose sum is σ = 26076860880. Its totient is φ = 12169201632.

The previous prime is 18905724049. The next prime is 18905724053. The reversal of 18905724051 is 15042750981.

It is an interprime number because it is at equal distance from previous prime (18905724049) and next prime (18905724053).

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

It is not a de Polignac number, because 18905724051 - 2¹ = 18905724049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18905723994 and 18905724012.

It is not an unprimeable number, because it can be changed into a prime (18905724053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108653500 + ... + 108653673.

It is an arithmetic number, because the mean of its divisors is an integer number (3259607610).

Almost surely, 2^18905724051 is an apocalyptic number.

18905724051 is a deficient number, since it is larger than the sum of its proper divisors (7171136829).

18905724051 is a wasteful number, since it uses less digits than its factorization.

18905724051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217307205.

The product of its (nonzero) digits is 100800, while the sum is 42.

The spelling of 18905724051 in words is "eighteen billion, nine hundred five million, seven hundred twenty-four thousand, fifty-one".