21342153013 has 4 divisors (see below), whose sum is σ = 21703884480. Its totient is φ = 20980421548.

The previous prime is 21342152987. The next prime is 21342153017. The reversal of 21342153013 is 31035124312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21342153013 - 2⁹ = 21342152501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342153017) 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, 180865645 + ... + 180865762.

It is an arithmetic number, because the mean of its divisors is an integer number (5425971120).

Almost surely, 2^21342153013 is an apocalyptic number.

It is an amenable number.

21342153013 is a deficient number, since it is larger than the sum of its proper divisors (361731467).

21342153013 is an equidigital number, since it uses as much as digits as its factorization.

21342153013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361731466.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 21342153013 its reverse (31035124312), we get a palindrome (52377277325).

The spelling of 21342153013 in words is "twenty-one billion, three hundred forty-two million, one hundred fifty-three thousand, thirteen".