20510412 has 24 divisors (see below), whose sum is σ = 51539376. Its totient is φ = 6310848.

The previous prime is 20510393. The next prime is 20510419. The reversal of 20510412 is 21401502.

It is a junction number, because it is equal to n+sod(n) for n = 20510391 and 20510400.

It is not an unprimeable number, because it can be changed into a prime (20510419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65583 + ... + 65894.

It is an arithmetic number, because the mean of its divisors is an integer number (2147474).

Almost surely, 2^20510412 is an apocalyptic number.

It is an amenable number.

20510412 is an abundant number, since it is smaller than the sum of its proper divisors (31028964).

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

20510412 is a wasteful number, since it uses less digits than its factorization.

20510412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131497 (or 131495 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 20510412 is about 4528.8422361571. The cubic root of 20510412 is about 273.7315110217.

Adding to 20510412 its reverse (21401502), we get a palindrome (41911914).

The spelling of 20510412 in words is "twenty million, five hundred ten thousand, four hundred twelve".