20503466978 has 8 divisors (see below), whose sum is σ = 32092383168. Its totient is φ = 9806005924.

The previous prime is 20503466969. The next prime is 20503466999. The reversal of 20503466978 is 87966430502.

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, 222863726 + ... + 222863817.

It is an arithmetic number, because the mean of its divisors is an integer number (4011547896).

Almost surely, 2^20503466978 is an apocalyptic number.

20503466978 is a deficient number, since it is larger than the sum of its proper divisors (11588916190).

20503466978 is a wasteful number, since it uses less digits than its factorization.

20503466978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445727568.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 20503466978 in words is "twenty billion, five hundred three million, four hundred sixty-six thousand, nine hundred seventy-eight".