20675774867842 has 16 divisors (see below), whose sum is σ = 31143433457664. Its totient is φ = 10294633368000.

The previous prime is 20675774867773. The next prime is 20675774867849. The reversal of 20675774867842 is 24876847757602.

It is not an unprimeable number, because it can be changed into a prime (20675774867849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13396167 + ... + 14859637.

It is an arithmetic number, because the mean of its divisors is an integer number (1946464591104).

Almost surely, 2^{20675774867842} is an apocalyptic number.

20675774867842 is a deficient number, since it is larger than the sum of its proper divisors (10467658589822).

20675774867842 is a wasteful number, since it uses less digits than its factorization.

20675774867842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493025.

The product of its (nonzero) digits is 1770209280, while the sum is 73.

The spelling of 20675774867842 in words is "twenty trillion, six hundred seventy-five billion, seven hundred seventy-four million, eight hundred sixty-seven thousand, eight hundred forty-two".