20190030 has 64 divisors (see below), whose sum is σ = 56125440. Its totient is φ = 4552704.

The previous prime is 20190029. The next prime is 20190097. The reversal of 20190030 is 3009102.

It is a super-2 number, since 2×20190030² = 815274622801800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 20189991 and 20190009.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15982 + ... + 17198.

It is an arithmetic number, because the mean of its divisors is an integer number (876960).

Almost surely, 2^20190030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20190030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28062720).

20190030 is an abundant number, since it is smaller than the sum of its proper divisors (35935410).

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

20190030 is a wasteful number, since it uses less digits than its factorization.

20190030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 20190030 is about 4493.3317260136. The cubic root of 20190030 is about 272.2987544239.

Adding to 20190030 its reverse (3009102), we get a palindrome (23199132).

It can be divided in two parts, 201900 and 30, that added together give a triangular number (201930 = T₆₃₅).

The spelling of 20190030 in words is "twenty million, one hundred ninety thousand, thirty".