20639383526 has 16 divisors (see below), whose sum is σ = 31301989488. Its totient is φ = 10205925600.

The previous prime is 20639383519. The next prime is 20639383547. The reversal of 20639383526 is 62538393602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57665 + ... + 211196.

It is an arithmetic number, because the mean of its divisors is an integer number (1956374343).

Almost surely, 2^20639383526 is an apocalyptic number.

20639383526 is a deficient number, since it is larger than the sum of its proper divisors (10662605962).

20639383526 is a wasteful number, since it uses less digits than its factorization.

20639383526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269287.

The product of its (nonzero) digits is 1399680, while the sum is 47.

The spelling of 20639383526 in words is "twenty billion, six hundred thirty-nine million, three hundred eighty-three thousand, five hundred twenty-six".