20637809386 has 16 divisors (see below), whose sum is σ = 32598941760. Its totient is φ = 9771926400.

The previous prime is 20637809377. The next prime is 20637809393. The reversal of 20637809386 is 68390873602.

20637809386 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9511 + ... + 203386.

It is an arithmetic number, because the mean of its divisors is an integer number (2037433860).

Almost surely, 2^20637809386 is an apocalyptic number.

20637809386 is a deficient number, since it is larger than the sum of its proper divisors (11961132374).

20637809386 is a wasteful number, since it uses less digits than its factorization.

20637809386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215469.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 20637809386 in words is "twenty billion, six hundred thirty-seven million, eight hundred nine thousand, three hundred eighty-six".