20382040402 has 4 divisors (see below), whose sum is σ = 30573060606. Its totient is φ = 10191020200.

The previous prime is 20382040381. The next prime is 20382040429. The reversal of 20382040402 is 20404028302.

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., 19985194161 + 396846241 = 141369^2 + 19921^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5095510099 + ... + 5095510102.

Almost surely, 2^20382040402 is an apocalyptic number.

20382040402 is a deficient number, since it is larger than the sum of its proper divisors (10191020204).

20382040402 is a wasteful number, since it uses less digits than its factorization.

20382040402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10191020203.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 20382040402 its reverse (20404028302), we get a palindrome (40786068704).

The spelling of 20382040402 in words is "twenty billion, three hundred eighty-two million, forty thousand, four hundred two".