21053350023 has 8 divisors (see below), whose sum is σ = 29039103600. Its totient is φ = 13551581568.

The previous prime is 21053349973. The next prime is 21053350027. The reversal of 21053350023 is 32005335012.

It is a happy number.

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

It is not a de Polignac number, because 21053350023 - 2⁶ = 21053349959 is a prime.

It is a super-3 number, since 3×21053350023³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21053349975 and 21053350002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21053350027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120996178 + ... + 120996351.

It is an arithmetic number, because the mean of its divisors is an integer number (3629887950).

Almost surely, 2^21053350023 is an apocalyptic number.

21053350023 is a deficient number, since it is larger than the sum of its proper divisors (7985753577).

21053350023 is a wasteful number, since it uses less digits than its factorization.

21053350023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241992561.

The product of its (nonzero) digits is 2700, while the sum is 24.

Adding to 21053350023 its reverse (32005335012), we get a palindrome (53058685035).

The spelling of 21053350023 in words is "twenty-one billion, fifty-three million, three hundred fifty thousand, twenty-three".