30100020 has 48 divisors (see below), whose sum is σ = 85131648. Its totient is φ = 7945600.

The previous prime is 30100019. The next prime is 30100051. The reversal of 30100020 is 2000103.

It is a super-2 number, since 2×30100020² = 1812022408000800, which contains 22 as substring.

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

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 30099981 and 30100008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3577 + ... + 8543.

It is an arithmetic number, because the mean of its divisors is an integer number (1773576).

Almost surely, 2^30100020 is an apocalyptic number.

30100020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30100020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42565824).

30100020 is an abundant number, since it is smaller than the sum of its proper divisors (55031628).

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

30100020 is a wasteful number, since it uses less digits than its factorization.

30100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080 (or 5078 counting only the distinct ones).

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

The square root of 30100020 is about 5486.3485124443. The cubic root of 30100020 is about 311.0681846480.

Adding to 30100020 its reverse (2000103), we get a palindrome (32100123).

The spelling of 30100020 in words is "thirty million, one hundred thousand, twenty".