18823740690 has 16 divisors (see below), whose sum is σ = 45176977728. Its totient is φ = 5019664176.

The previous prime is 18823740583. The next prime is 18823740701. The reversal of 18823740690 is 9604732881.

It is a super-2 number, since 2×18823740690² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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, 313728982 + ... + 313729041.

It is an arithmetic number, because the mean of its divisors is an integer number (2823561108).

Almost surely, 2^18823740690 is an apocalyptic number.

18823740690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18823740690 is an abundant number, since it is smaller than the sum of its proper divisors (26353237038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18823740690 is a wasteful number, since it uses less digits than its factorization.

18823740690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627458033.

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 18823740690 in words is "eighteen billion, eight hundred twenty-three million, seven hundred forty thousand, six hundred ninety".