20427238834 has 8 divisors (see below), whose sum is σ = 31697439660. Its totient is φ = 9861425616.

The previous prime is 20427238831. The next prime is 20427238847. The reversal of 20427238834 is 43883272402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20122841025 + 304397809 = 141855^2 + 17447^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20427238831) 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, 176096829 + ... + 176096944.

Almost surely, 2^20427238834 is an apocalyptic number.

20427238834 is a deficient number, since it is larger than the sum of its proper divisors (11270200826).

20427238834 is a wasteful number, since it uses less digits than its factorization.

20427238834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352193804.

The product of its (nonzero) digits is 516096, while the sum is 43.

The spelling of 20427238834 in words is "twenty billion, four hundred twenty-seven million, two hundred thirty-eight thousand, eight hundred thirty-four".