20500142 has 8 divisors (see below), whose sum is σ = 33115656. Its totient is φ = 9461592.

The previous prime is 20500097. The next prime is 20500159. The reversal of 20500142 is 24100502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394208 + ... + 394259.

It is an arithmetic number, because the mean of its divisors is an integer number (4139457).

Almost surely, 2^20500142 is an apocalyptic number.

20500142 is a deficient number, since it is larger than the sum of its proper divisors (12615514).

20500142 is a wasteful number, since it uses less digits than its factorization.

20500142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788482.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 20500142 is about 4527.7082503183. The cubic root of 20500142 is about 273.6858156620.

Adding to 20500142 its reverse (24100502), we get a palindrome (44600644).

The spelling of 20500142 in words is "twenty million, five hundred thousand, one hundred forty-two".