20649184010797 has 4 divisors (see below), whose sum is σ = 21735983169280. Its totient is φ = 19562384852316.

The previous prime is 20649184010789. The next prime is 20649184010803. The reversal of 20649184010797 is 79701048194602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20649184010797 - 2³ = 20649184010789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20649184010717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 543399579213 + ... + 543399579250.

It is an arithmetic number, because the mean of its divisors is an integer number (5433995792320).

Almost surely, 2^{20649184010797} is an apocalyptic number.

It is an amenable number.

20649184010797 is a deficient number, since it is larger than the sum of its proper divisors (1086799158483).

20649184010797 is a wasteful number, since it uses less digits than its factorization.

20649184010797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086799158482.

The product of its (nonzero) digits is 6096384, while the sum is 58.

The spelling of 20649184010797 in words is "twenty trillion, six hundred forty-nine billion, one hundred eighty-four million, ten thousand, seven hundred ninety-seven".