21862815338846 has 8 divisors (see below), whose sum is σ = 32794277930424. Its totient is φ = 10931389362040.

The previous prime is 21862815338809. The next prime is 21862815338849. The reversal of 21862815338846 is 64883351826812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21862815338846² (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 (21862815338849) 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, 7608785 + ... + 10080636.

It is an arithmetic number, because the mean of its divisors is an integer number (4099284741303).

Almost surely, 2^{21862815338846} is an apocalyptic number.

21862815338846 is a deficient number, since it is larger than the sum of its proper divisors (10931462591578).

21862815338846 is a wasteful number, since it uses less digits than its factorization.

21862815338846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18307386.

The product of its digits is 106168320, while the sum is 65.

The spelling of 21862815338846 in words is "twenty-one trillion, eight hundred sixty-two billion, eight hundred fifteen million, three hundred thirty-eight thousand, eight hundred forty-six".