20400222223999 has 4 divisors (see below), whose sum is σ = 20785132077336. Its totient is φ = 20015312370664.

The previous prime is 20400222223963. The next prime is 20400222224029. The reversal of 20400222223999 is 99932222200402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20400222223999 - 2²⁹ = 20399685353087 is a prime.

It is a super-3 number, since 3×20400222223999³ (a number of 41 digits) contains 333 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 (20400222223699) 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, 192454926589 + ... + 192454926694.

It is an arithmetic number, because the mean of its divisors is an integer number (5196283019334).

Almost surely, 2^{20400222223999} is an apocalyptic number.

20400222223999 is a deficient number, since it is larger than the sum of its proper divisors (384909853337).

20400222223999 is an equidigital number, since it uses as much as digits as its factorization.

20400222223999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384909853336.

The product of its (nonzero) digits is 559872, while the sum is 46.

The spelling of 20400222223999 in words is "twenty trillion, four hundred billion, two hundred twenty-two million, two hundred twenty-three thousand, nine hundred ninety-nine".