20800136763669 has 16 divisors (see below), whose sum is σ = 28522534404672. Its totient is φ = 13475522419968.

The previous prime is 20800136763589. The next prime is 20800136763683. The reversal of 20800136763669 is 96636763100802.

It is not a de Polignac number, because 20800136763669 - 2⁹ = 20800136763157 is a prime.

It is a super-2 number, since 2×20800136763669² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20800136763269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409216644 + ... + 409267469.

It is an arithmetic number, because the mean of its divisors is an integer number (1782658400292).

Almost surely, 2^{20800136763669} is an apocalyptic number.

It is an amenable number.

20800136763669 is a deficient number, since it is larger than the sum of its proper divisors (7722397641003).

20800136763669 is a wasteful number, since it uses less digits than its factorization.

20800136763669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818484356.

The product of its (nonzero) digits is 11757312, while the sum is 57.

The spelling of 20800136763669 in words is "twenty trillion, eight hundred billion, one hundred thirty-six million, seven hundred sixty-three thousand, six hundred sixty-nine".