21436143477790 has 16 divisors (see below), whose sum is σ = 38623148167968. Its totient is φ = 8565992967136.

The previous prime is 21436143477781. The next prime is 21436143477817. The reversal of 21436143477790 is 9777434163412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1058042362 + ... + 1058062621.

It is an arithmetic number, because the mean of its divisors is an integer number (2413946760498).

Almost surely, 2^{21436143477790} is an apocalyptic number.

21436143477790 is a deficient number, since it is larger than the sum of its proper divisors (17187004690178).

21436143477790 is a wasteful number, since it uses less digits than its factorization.

21436143477790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116106003.

The product of its (nonzero) digits is 21337344, while the sum is 58.

The spelling of 21436143477790 in words is "twenty-one trillion, four hundred thirty-six billion, one hundred forty-three million, four hundred seventy-seven thousand, seven hundred ninety".