20251074164242 has 4 divisors (see below), whose sum is σ = 30376611246366. Its totient is φ = 10125537082120.

The previous prime is 20251074164239. The next prime is 20251074164287. The reversal of 20251074164242 is 24246147015202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18073475166681 + 2177598997561 = 4251291^2 + 1475669^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20251074164195 and 20251074164204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5062768541059 + ... + 5062768541062.

Almost surely, 2^{20251074164242} is an apocalyptic number.

20251074164242 is a deficient number, since it is larger than the sum of its proper divisors (10125537082124).

20251074164242 is a wasteful number, since it uses less digits than its factorization.

20251074164242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10125537082123.

The product of its (nonzero) digits is 215040, while the sum is 40.

The spelling of 20251074164242 in words is "twenty trillion, two hundred fifty-one billion, seventy-four million, one hundred sixty-four thousand, two hundred forty-two".