21014042320153 has 4 divisors (see below), whose sum is σ = 21218062148608. Its totient is φ = 20810022491700.

The previous prime is 21014042320147. The next prime is 21014042320189. The reversal of 21014042320153 is 35102324041012.

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 a de Polignac number, because none of the positive numbers 2^k-21014042320153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21014042330153) 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, 102009914073 + ... + 102009914278.

It is an arithmetic number, because the mean of its divisors is an integer number (5304515537152).

Almost surely, 2^{21014042320153} is an apocalyptic number.

It is an amenable number.

21014042320153 is a deficient number, since it is larger than the sum of its proper divisors (204019828455).

21014042320153 is a wasteful number, since it uses less digits than its factorization.

21014042320153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204019828454.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 21014042320153 its reverse (35102324041012), we get a palindrome (56116366361165).

The spelling of 21014042320153 in words is "twenty-one trillion, fourteen billion, forty-two million, three hundred twenty thousand, one hundred fifty-three".