20850040137 has 16 divisors (see below), whose sum is σ = 27895345920. Its totient is φ = 13852425552.

The previous prime is 20850040121. The next prime is 20850040147. The reversal of 20850040137 is 73104005802.

It is not a de Polignac number, because 20850040137 - 2⁴ = 20850040121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20850040147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2430618 + ... + 2439180.

It is an arithmetic number, because the mean of its divisors is an integer number (1743459120).

Almost surely, 2^20850040137 is an apocalyptic number.

It is an amenable number.

20850040137 is a deficient number, since it is larger than the sum of its proper divisors (7045305783).

20850040137 is a wasteful number, since it uses less digits than its factorization.

20850040137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11252.

The product of its (nonzero) digits is 6720, while the sum is 30.

Adding to 20850040137 its reverse (73104005802), we get a palindrome (93954045939).

The spelling of 20850040137 in words is "twenty billion, eight hundred fifty million, forty thousand, one hundred thirty-seven".