21153140023 has 8 divisors (see below), whose sum is σ = 21969365760. Its totient is φ = 20352171000.

The previous prime is 21153139949. The next prime is 21153140033. The reversal of 21153140023 is 32004135112.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21153140023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21153139976 and 21153140003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21153140033) 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, 3811353 + ... + 3816898.

It is an arithmetic number, because the mean of its divisors is an integer number (2746170720).

Almost surely, 2^21153140023 is an apocalyptic number.

21153140023 is a deficient number, since it is larger than the sum of its proper divisors (816225737).

21153140023 is an equidigital number, since it uses as much as digits as its factorization.

21153140023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7628357.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 21153140023 its reverse (32004135112), we get a palindrome (53157275135).

The spelling of 21153140023 in words is "twenty-one billion, one hundred fifty-three million, one hundred forty thousand, twenty-three".