20382778402 has 8 divisors (see below), whose sum is σ = 34941905856. Its totient is φ = 8735476452.

The previous prime is 20382778393. The next prime is 20382778501. The reversal of 20382778402 is 20487728302.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 727956358 + ... + 727956385.

It is an arithmetic number, because the mean of its divisors is an integer number (4367738232).

Almost surely, 2^20382778402 is an apocalyptic number.

20382778402 is a deficient number, since it is larger than the sum of its proper divisors (14559127454).

20382778402 is a wasteful number, since it uses less digits than its factorization.

20382778402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455912752.

The product of its (nonzero) digits is 301056, while the sum is 43.

The spelling of 20382778402 in words is "twenty billion, three hundred eighty-two million, seven hundred seventy-eight thousand, four hundred two".