20115012 has 48 divisors (see below), whose sum is σ = 50101632. Its totient is φ = 6259200.

The previous prime is 20114993. The next prime is 20115023. The reversal of 20115012 is 21051102.

It is a super-2 number, since 2×20115012² = 809227415520288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 30478 + ... + 31130.

It is an arithmetic number, because the mean of its divisors is an integer number (1043784).

Almost surely, 2^20115012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20115012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25050816).

20115012 is an abundant number, since it is smaller than the sum of its proper divisors (29986620).

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

20115012 is a wasteful number, since it uses less digits than its factorization.

20115012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828 (or 826 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 20115012 is about 4484.9762541177. The cubic root of 20115012 is about 271.9610851190.

Adding to 20115012 its reverse (21051102), we get a palindrome (41166114).

The spelling of 20115012 in words is "twenty million, one hundred fifteen thousand, twelve".