21144423432350 has 24 divisors (see below), whose sum is σ = 39418214476080. Its totient is φ = 8438503374720.

The previous prime is 21144423432283. The next prime is 21144423432359. The reversal of 21144423432350 is 5323432444112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21144423432359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 481627787 + ... + 481671686.

It is an arithmetic number, because the mean of its divisors is an integer number (1642425603170).

Almost surely, 2^{21144423432350} is an apocalyptic number.

21144423432350 is a deficient number, since it is larger than the sum of its proper divisors (18273791043730).

21144423432350 is a wasteful number, since it uses less digits than its factorization.

21144423432350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963299924 (or 963299919 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 38.

Adding to 21144423432350 its reverse (5323432444112), we get a palindrome (26467855876462).

The spelling of 21144423432350 in words is "twenty-one trillion, one hundred forty-four billion, four hundred twenty-three million, four hundred thirty-two thousand, three hundred fifty".