20410123124242 has 4 divisors (see below), whose sum is σ = 30615184686366. Its totient is φ = 10205061562120.

The previous prime is 20410123124221. The next prime is 20410123124257. The reversal of 20410123124242 is 24242132101402.

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., 12996161990361 + 7413961133881 = 3605019^2 + 2722859^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20410123124242.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5102530781059 + ... + 5102530781062.

Almost surely, 2^{20410123124242} is an apocalyptic number.

20410123124242 is a deficient number, since it is larger than the sum of its proper divisors (10205061562124).

20410123124242 is a wasteful number, since it uses less digits than its factorization.

20410123124242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10205061562123.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 20410123124242 its reverse (24242132101402), we get a palindrome (44652255225644).

The spelling of 20410123124242 in words is "twenty trillion, four hundred ten billion, one hundred twenty-three million, one hundred twenty-four thousand, two hundred forty-two".