20126455643674 has 16 divisors (see below), whose sum is σ = 30375856592640. Its totient is φ = 10001174016960.

The previous prime is 20126455643627. The next prime is 20126455643677. The reversal of 20126455643674 is 47634655462102.

It is not an unprimeable number, because it can be changed into a prime (20126455643677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9523954 + ... + 11443714.

It is an arithmetic number, because the mean of its divisors is an integer number (1898491037040).

Almost surely, 2^{20126455643674} is an apocalyptic number.

20126455643674 is a deficient number, since it is larger than the sum of its proper divisors (10249400948966).

20126455643674 is a wasteful number, since it uses less digits than its factorization.

20126455643674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952085.

The product of its (nonzero) digits is 29030400, while the sum is 55.

The spelling of 20126455643674 in words is "twenty trillion, one hundred twenty-six billion, four hundred fifty-five million, six hundred forty-three thousand, six hundred seventy-four".