20251126454642 has 32 divisors (see below), whose sum is σ = 32789991532032. Its totient is φ = 9345606361344.

The previous prime is 20251126454639. The next prime is 20251126454681. The reversal of 20251126454642 is 24645462115202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20251126454593 and 20251126454602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19424453 + ... + 20440440.

It is an arithmetic number, because the mean of its divisors is an integer number (1024687235376).

Almost surely, 2^{20251126454642} is an apocalyptic number.

20251126454642 is a deficient number, since it is larger than the sum of its proper divisors (12538865077390).

20251126454642 is a wasteful number, since it uses less digits than its factorization.

20251126454642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39865202.

The product of its (nonzero) digits is 921600, while the sum is 44.

Adding to 20251126454642 its reverse (24645462115202), we get a palindrome (44896588569844).

The spelling of 20251126454642 in words is "twenty trillion, two hundred fifty-one billion, one hundred twenty-six million, four hundred fifty-four thousand, six hundred forty-two".