21753123046 has 8 divisors (see below), whose sum is σ = 32707191024. Its totient is φ = 10850726040.

The previous prime is 21753123043. The next prime is 21753123053. The reversal of 21753123046 is 64032135712.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21753123043) 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, 12916690 + ... + 12918373.

It is an arithmetic number, because the mean of its divisors is an integer number (4088398878).

Almost surely, 2^21753123046 is an apocalyptic number.

21753123046 is a deficient number, since it is larger than the sum of its proper divisors (10954067978).

21753123046 is a wasteful number, since it uses less digits than its factorization.

21753123046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25835486.

The product of its (nonzero) digits is 30240, while the sum is 34.

Adding to 21753123046 its reverse (64032135712), we get a palindrome (85785258758).

The spelling of 21753123046 in words is "twenty-one billion, seven hundred fifty-three million, one hundred twenty-three thousand, forty-six".