20100030 has 16 divisors (see below), whose sum is σ = 48240144. Its totient is φ = 5360000.

The previous prime is 20100023. The next prime is 20100053. The reversal of 20100030 is 3000102.

It is a super-2 number, since 2×20100030² = 808022412001800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a junction number, because it is equal to n+sod(n) for n = 20099991 and 20100018.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334971 + ... + 335030.

It is an arithmetic number, because the mean of its divisors is an integer number (3015009).

Almost surely, 2^20100030 is an apocalyptic number.

20100030 is an abundant number, since it is smaller than the sum of its proper divisors (28140114).

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

20100030 is a wasteful number, since it uses less digits than its factorization.

20100030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670011.

The product of its (nonzero) digits is 6, while the sum is 6.

The square root of 20100030 is about 4483.3057000388. The cubic root of 20100030 is about 271.8935479485.

Adding to 20100030 its reverse (3000102), we get a palindrome (23100132).

The spelling of 20100030 in words is "twenty million, one hundred thousand, thirty".