20211002190 has 96 divisors (see below), whose sum is σ = 54726516000. Its totient is φ = 5168728320.

The previous prime is 20211002167. The next prime is 20211002191. The reversal of 20211002190 is 9120011202.

It is a super-2 number, since 2×20211002190² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211002191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 362905 + ... + 414875.

It is an arithmetic number, because the mean of its divisors is an integer number (570067875).

Almost surely, 2^20211002190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20211002190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27363258000).

20211002190 is an abundant number, since it is smaller than the sum of its proper divisors (34515513810).

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

20211002190 is a wasteful number, since it uses less digits than its factorization.

20211002190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52162 (or 52159 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 20211002190 its reverse (9120011202), we get a palindrome (29331013392).

The spelling of 20211002190 in words is "twenty billion, two hundred eleven million, two thousand, one hundred ninety".