20836288509990 has 16 divisors (see below), whose sum is σ = 50007092424048. Its totient is φ = 5556343602656.

The previous prime is 20836288509917. The next prime is 20836288510001. The reversal of 20836288509990 is 9990588263802.

It is a Curzon number.

It is a congruent number.

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, 347271475137 + ... + 347271475196.

It is an arithmetic number, because the mean of its divisors is an integer number (3125443276503).

Almost surely, 2^{20836288509990} is an apocalyptic number.

20836288509990 is an abundant number, since it is smaller than the sum of its proper divisors (29170803914058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20836288509990 is a wasteful number, since it uses less digits than its factorization.

20836288509990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694542950343.

The product of its (nonzero) digits is 134369280, while the sum is 69.

The spelling of 20836288509990 in words is "twenty trillion, eight hundred thirty-six billion, two hundred eighty-eight million, five hundred nine thousand, nine hundred ninety".