20123021234242 has 8 divisors (see below), whose sum is σ = 31960092548556. Its totient is φ = 9469657051392.

The previous prime is 20123021234209. The next prime is 20123021234363. The reversal of 20123021234242 is 24243212032102.

It can be written as a sum of positive squares in 2 ways, for example, as 20123020685161 + 549081 = 4485869^2 + 741^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20123021234242.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295926782823 + ... + 295926782890.

Almost surely, 2^{20123021234242} is an apocalyptic number.

20123021234242 is a deficient number, since it is larger than the sum of its proper divisors (11837071314314).

20123021234242 is a wasteful number, since it uses less digits than its factorization.

20123021234242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591853565732.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20123021234242 its reverse (24243212032102), we get a palindrome (44366233266344).

The spelling of 20123021234242 in words is "twenty trillion, one hundred twenty-three billion, twenty-one million, two hundred thirty-four thousand, two hundred forty-two".