20115030 has 32 divisors (see below), whose sum is σ = 51990624. Its totient is φ = 4951296.

The previous prime is 20115023. The next prime is 20115031. The reversal of 20115030 is 3051102.

It is a super-2 number, since 2×20115030² = 809228863801800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20114997 and 20115015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25399 + ... + 26178.

It is an arithmetic number, because the mean of its divisors is an integer number (1624707).

Almost surely, 2^20115030 is an apocalyptic number.

20115030 is an abundant number, since it is smaller than the sum of its proper divisors (31875594).

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

20115030 is a wasteful number, since it uses less digits than its factorization.

20115030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51600.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 20115030 is about 4484.9782608169. The cubic root of 20115030 is about 271.9611662408.

Adding to 20115030 its reverse (3051102), we get a palindrome (23166132).

The spelling of 20115030 in words is "twenty million, one hundred fifteen thousand, thirty".