20020219978 has 8 divisors (see below), whose sum is σ = 32760360000. Its totient is φ = 9100099980.

The previous prime is 20020219931. The next prime is 20020220023. The reversal of 20020219978 is 87991202002.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20020219978.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455004978 + ... + 455005021.

It is an arithmetic number, because the mean of its divisors is an integer number (4095045000).

Almost surely, 2^20020219978 is an apocalyptic number.

20020219978 is a deficient number, since it is larger than the sum of its proper divisors (12740140022).

20020219978 is a wasteful number, since it uses less digits than its factorization.

20020219978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910010012.

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 20020219978 in words is "twenty billion, twenty million, two hundred nineteen thousand, nine hundred seventy-eight".