18823016810 has 32 divisors (see below), whose sum is σ = 36810622800. Its totient is φ = 6888526848.

The previous prime is 18823016801. The next prime is 18823016831. The reversal of 18823016810 is 1861032881.

It is a Cunningham number, because it is equal to 137197²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 331640521 + 18491376289 = 18211^2 + 135983^2 .

It is a super-2 number, since 2×18823016810² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 625985 + ... + 655364.

Almost surely, 2^18823016810 is an apocalyptic number.

18823016810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18823016810 is a deficient number, since it is larger than the sum of its proper divisors (17987605990).

18823016810 is a wasteful number, since it uses less digits than its factorization.

18823016810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281482.

The product of its (nonzero) digits is 18432, while the sum is 38.

The spelling of 18823016810 in words is "eighteen billion, eight hundred twenty-three million, sixteen thousand, eight hundred ten".