21864627352797 has 32 divisors (see below), whose sum is σ = 30264192211968. Its totient is φ = 14030909133696.

The previous prime is 21864627352793. The next prime is 21864627352807. The reversal of 21864627352797 is 79725372646812.

It is not a de Polignac number, because 21864627352797 - 2² = 21864627352793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21864627352793) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 10567758 + ... + 12466224.

It is an arithmetic number, because the mean of its divisors is an integer number (945756006624).

Almost surely, 2^{21864627352797} is an apocalyptic number.

It is an amenable number.

21864627352797 is a deficient number, since it is larger than the sum of its proper divisors (8399564859171).

21864627352797 is a wasteful number, since it uses less digits than its factorization.

21864627352797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899809.

The product of its digits is 426746880, while the sum is 69.

The spelling of 21864627352797 in words is "twenty-one trillion, eight hundred sixty-four billion, six hundred twenty-seven million, three hundred fifty-two thousand, seven hundred ninety-seven".