20379447890 has 16 divisors (see below), whose sum is σ = 36694026432. Its totient is φ = 8149330224.

The previous prime is 20379447853. The next prime is 20379447941. The reversal of 20379447890 is 9874497302.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270974 + ... + 337913.

It is an arithmetic number, because the mean of its divisors is an integer number (2293376652).

Almost surely, 2^20379447890 is an apocalyptic number.

20379447890 is a deficient number, since it is larger than the sum of its proper divisors (16314578542).

20379447890 is a wasteful number, since it uses less digits than its factorization.

20379447890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612241.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 20379447890 in words is "twenty billion, three hundred seventy-nine million, four hundred forty-seven thousand, eight hundred ninety".