21031005067153 has 4 divisors (see below), whose sum is σ = 21032453597760. Its totient is φ = 21029556536548.

The previous prime is 21031005067147. The next prime is 21031005067181. The reversal of 21031005067153 is 35176050013012.

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-21031005067153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21031005067123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724243525 + ... + 724272562.

It is an arithmetic number, because the mean of its divisors is an integer number (5258113399440).

Almost surely, 2^{21031005067153} is an apocalyptic number.

It is an amenable number.

21031005067153 is a deficient number, since it is larger than the sum of its proper divisors (1448530607).

21031005067153 is a wasteful number, since it uses less digits than its factorization.

21031005067153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448530606.

The product of its (nonzero) digits is 18900, while the sum is 34.

The spelling of 21031005067153 in words is "twenty-one trillion, thirty-one billion, five million, sixty-seven thousand, one hundred fifty-three".