19810098 has 48 divisors (see below), whose sum is σ = 53516736. Its totient is φ = 5145120.

The previous prime is 19810097. The next prime is 19810111. The reversal of 19810098 is 89001891.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19810097) 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, 5761 + ... + 8532.

It is an arithmetic number, because the mean of its divisors is an integer number (1114932).

Almost surely, 2^19810098 is an apocalyptic number.

19810098 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19810098 is an abundant number, since it is smaller than the sum of its proper divisors (33706638).

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

19810098 is a wasteful number, since it uses less digits than its factorization.

19810098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14319 (or 14316 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 19810098 is about 4450.8536259913. The cubic root of 19810098 is about 270.5799058502.

It can be divided in two parts, 198 and 10098, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 19810098 in words is "nineteen million, eight hundred ten thousand, ninety-eight".