20028783490 has 16 divisors (see below), whose sum is σ = 37214772480. Its totient is φ = 7753077360.

The previous prime is 20028783457. The next prime is 20028783517. The reversal of 20028783490 is 9438782002.

It is a happy 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, 32304180 + ... + 32304799.

It is an arithmetic number, because the mean of its divisors is an integer number (2325923280).

Almost surely, 2^20028783490 is an apocalyptic number.

20028783490 is a deficient number, since it is larger than the sum of its proper divisors (17185988990).

20028783490 is a wasteful number, since it uses less digits than its factorization.

20028783490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64609017.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 20028783490 in words is "twenty billion, twenty-eight million, seven hundred eighty-three thousand, four hundred ninety".