20211012 has 24 divisors (see below), whose sum is σ = 52399200. Its totient is φ = 6736968.

The previous prime is 20211007. The next prime is 20211031. The reversal of 20211012 is 21011202.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20210985 and 20211003.

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, 93462 + ... + 93677.

It is an arithmetic number, because the mean of its divisors is an integer number (2183300).

Almost surely, 2^20211012 is an apocalyptic number.

It is an amenable number.

20211012 is an abundant number, since it is smaller than the sum of its proper divisors (32188188).

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

20211012 is a wasteful number, since it uses less digits than its factorization.

20211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187152 (or 187144 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 20211012 is about 4495.6659128543. The cubic root of 20211012 is about 272.3930483972.

Adding to 20211012 its reverse (21011202), we get a palindrome (41222214).

The spelling of 20211012 in words is "twenty million, two hundred eleven thousand, twelve".