20611098 has 40 divisors (see below), whose sum is σ = 47184192. Its totient is φ = 6721704.

The previous prime is 20611091. The next prime is 20611099. The reversal of 20611098 is 89011602.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20611091) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6261 + ... + 8967.

Almost surely, 2^20611098 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20611098, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23592096).

20611098 is an abundant number, since it is smaller than the sum of its proper divisors (26573094).

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

20611098 is a wasteful number, since it uses less digits than its factorization.

20611098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2768 (or 2759 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 20611098 is about 4539.9447133198. The cubic root of 20611098 is about 274.1786977882.

The spelling of 20611098 in words is "twenty million, six hundred eleven thousand, ninety-eight".