18928206442 has 16 divisors (see below), whose sum is σ = 28455432192. Its totient is φ = 9443084560.

The previous prime is 18928206403. The next prime is 18928206443. The reversal of 18928206442 is 24460282981.

It is a super-2 number, since 2×18928206442² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18928206392 and 18928206401.

It is not an unprimeable number, because it can be changed into a prime (18928206443) 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, 2138967 + ... + 2147797.

It is an arithmetic number, because the mean of its divisors is an integer number (1778464512).

Almost surely, 2^18928206442 is an apocalyptic number.

18928206442 is a deficient number, since it is larger than the sum of its proper divisors (9527225750).

18928206442 is a wasteful number, since it uses less digits than its factorization.

18928206442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11093.

The product of its (nonzero) digits is 442368, while the sum is 46.

The spelling of 18928206442 in words is "eighteen billion, nine hundred twenty-eight million, two hundred six thousand, four hundred forty-two".