18792081 has 80 divisors (see below), whose sum is σ = 36799488. Its totient is φ = 9266400.

The previous prime is 18792079. The next prime is 18792143. The reversal of 18792081 is 18029781.

It is not a de Polignac number, because 18792081 - 2¹ = 18792079 is a prime.

It is a super-2 number, since 2×18792081² = 706284616621122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18792061) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 143386 + ... + 143516.

Almost surely, 2^18792081 is an apocalyptic number.

18792081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18792081 is a deficient number, since it is larger than the sum of its proper divisors (18007407).

18792081 is a wasteful number, since it uses less digits than its factorization.

18792081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 18792081 is about 4334.9833909716. The cubic root of 18792081 is about 265.8632392879.

The spelling of 18792081 in words is "eighteen million, seven hundred ninety-two thousand, eighty-one".