20142580 has 12 divisors (see below), whose sum is σ = 42299460. Its totient is φ = 8057024.

The previous prime is 20142553. The next prime is 20142583. The reversal of 20142580 is 8524102.

It can be written as a sum of positive squares in 2 ways, for example, as 3283344 + 16859236 = 1812^2 + 4106^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20142583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503545 + ... + 503584.

It is an arithmetic number, because the mean of its divisors is an integer number (3524955).

Almost surely, 2^20142580 is an apocalyptic number.

20142580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20142580 is an abundant number, since it is smaller than the sum of its proper divisors (22156880).

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

20142580 is a wasteful number, since it uses less digits than its factorization.

20142580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007138 (or 1007136 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 20142580 is about 4488.0485737122. The cubic root of 20142580 is about 272.0852709871.

Adding to 20142580 its reverse (8524102), we get a palindrome (28666682).

The spelling of 20142580 in words is "twenty million, one hundred forty-two thousand, five hundred eighty".