20142550 has 12 divisors (see below), whose sum is σ = 37465236. Its totient is φ = 8057000.

The previous prime is 20142547. The next prime is 20142553. The reversal of 20142550 is 5524102.

It is an interprime number because it is at equal distance from previous prime (20142547) and next prime (20142553).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20142553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201376 + ... + 201475.

It is an arithmetic number, because the mean of its divisors is an integer number (3122103).

Almost surely, 2^20142550 is an apocalyptic number.

20142550 is a deficient number, since it is larger than the sum of its proper divisors (17322686).

20142550 is a wasteful number, since it uses less digits than its factorization.

20142550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402863 (or 402858 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20142550 is about 4488.0452315011. The cubic root of 20142550 is about 272.0851359074.

Adding to 20142550 its reverse (5524102), we get a palindrome (25666652).

The spelling of 20142550 in words is "twenty million, one hundred forty-two thousand, five hundred fifty".