20696402126869 has 4 divisors (see below), whose sum is σ = 23653031002144. Its totient is φ = 17739773251596.

The previous prime is 20696402126809. The next prime is 20696402126879. The reversal of 20696402126869 is 96862120469602.

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 20696402126869 - 2⁹ = 20696402126357 is a prime.

It is a super-2 number, since 2×20696402126869² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20696402126809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1478314437627 + ... + 1478314437640.

It is an arithmetic number, because the mean of its divisors is an integer number (5913257750536).

Almost surely, 2^{20696402126869} is an apocalyptic number.

It is an amenable number.

20696402126869 is a deficient number, since it is larger than the sum of its proper divisors (2956628875275).

20696402126869 is an equidigital number, since it uses as much as digits as its factorization.

20696402126869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2956628875274.

The product of its (nonzero) digits is 26873856, while the sum is 61.

The spelling of 20696402126869 in words is "twenty trillion, six hundred ninety-six billion, four hundred two million, one hundred twenty-six thousand, eight hundred sixty-nine".