20123516242 has 8 divisors (see below), whose sum is σ = 30219307776. Its totient is φ = 10050413652.

The previous prime is 20123516239. The next prime is 20123516243. The reversal of 20123516242 is 24261532102.

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 20123516242.

It is not an unprimeable number, because it can be changed into a prime (20123516243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5670018 + ... + 5673565.

It is an arithmetic number, because the mean of its divisors is an integer number (3777413472).

Almost surely, 2^20123516242 is an apocalyptic number.

20123516242 is a deficient number, since it is larger than the sum of its proper divisors (10095791534).

20123516242 is a wasteful number, since it uses less digits than its factorization.

20123516242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11344472.

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 20123516242 in words is "twenty billion, one hundred twenty-three million, five hundred sixteen thousand, two hundred forty-two".