20338388542 has 4 divisors (see below), whose sum is σ = 30507582816. Its totient is φ = 10169194270.

The previous prime is 20338388533. The next prime is 20338388563. The reversal of 20338388542 is 24588383302.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 20338388492 and 20338388501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5084597134 + ... + 5084597137.

It is an arithmetic number, because the mean of its divisors is an integer number (7626895704).

Almost surely, 2^20338388542 is an apocalyptic number.

20338388542 is a deficient number, since it is larger than the sum of its proper divisors (10169194274).

20338388542 is a wasteful number, since it uses less digits than its factorization.

20338388542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10169194273.

The product of its (nonzero) digits is 1105920, while the sum is 46.

The spelling of 20338388542 in words is "twenty billion, three hundred thirty-eight million, three hundred eighty-eight thousand, five hundred forty-two".