20452017242 has 4 divisors (see below), whose sum is σ = 30678025866. Its totient is φ = 10226008620.

The previous prime is 20452017233. The next prime is 20452017247. The reversal of 20452017242 is 24271025402.

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., 18672949201 + 1779068041 = 136649^2 + 42179^2 .

It is not an unprimeable number, because it can be changed into a prime (20452017247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5113004309 + ... + 5113004312.

Almost surely, 2^20452017242 is an apocalyptic number.

20452017242 is a deficient number, since it is larger than the sum of its proper divisors (10226008624).

20452017242 is a wasteful number, since it uses less digits than its factorization.

20452017242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10226008623.

The product of its (nonzero) digits is 8960, while the sum is 29.

The spelling of 20452017242 in words is "twenty billion, four hundred fifty-two million, seventeen thousand, two hundred forty-two".