20051243141042 has 4 divisors (see below), whose sum is σ = 30076864711566. Its totient is φ = 10025621570520.

The previous prime is 20051243141023. The next prime is 20051243141051. The reversal of 20051243141042 is 24014134215002.

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., 17778020527201 + 2273222613841 = 4216399^2 + 1507721^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20051243140996 and 20051243141014.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5012810785259 + ... + 5012810785262.

Almost surely, 2^{20051243141042} is an apocalyptic number.

20051243141042 is a deficient number, since it is larger than the sum of its proper divisors (10025621570524).

20051243141042 is a wasteful number, since it uses less digits than its factorization.

20051243141042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10025621570523.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 20051243141042 its reverse (24014134215002), we get a palindrome (44065377356044).

The spelling of 20051243141042 in words is "twenty trillion, fifty-one billion, two hundred forty-three million, one hundred forty-one thousand, forty-two".