18992061 has 24 divisors (see below), whose sum is σ = 30663360. Its totient is φ = 11227200.

The previous prime is 18992059. The next prime is 18992087. The reversal of 18992061 is 16029981.

It is not a de Polignac number, because 18992061 - 2¹ = 18992059 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18992161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1720 + ... + 6398.

It is an arithmetic number, because the mean of its divisors is an integer number (1277640).

Almost surely, 2^18992061 is an apocalyptic number.

18992061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18992061 is a deficient number, since it is larger than the sum of its proper divisors (11671299).

18992061 is a wasteful number, since it uses less digits than its factorization.

18992061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4737 (or 4734 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 18992061 is about 4357.9881826366. The cubic root of 18992061 is about 266.8029940091.

It can be divided in two parts, 189920 and 61, that added together give a palindrome (189981).

The spelling of 18992061 in words is "eighteen million, nine hundred ninety-two thousand, sixty-one".