20450026251242 has 16 divisors (see below), whose sum is σ = 36902303010240. Its totient is φ = 8303018177088.

The previous prime is 20450026251229. The next prime is 20450026251247. The reversal of 20450026251242 is 24215262005402.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20450026251247) 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, 38439898703 + ... + 38439899234.

It is an arithmetic number, because the mean of its divisors is an integer number (2306393938140).

Almost surely, 2^{20450026251242} is an apocalyptic number.

20450026251242 is a deficient number, since it is larger than the sum of its proper divisors (16452276758998).

20450026251242 is a wasteful number, since it uses less digits than its factorization.

20450026251242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76879797965.

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 20450026251242 its reverse (24215262005402), we get a palindrome (44665288256644).

The spelling of 20450026251242 in words is "twenty trillion, four hundred fifty billion, twenty-six million, two hundred fifty-one thousand, two hundred forty-two".