21517153745133 has 16 divisors (see below), whose sum is σ = 28866166479360. Its totient is φ = 14256458860464.

The previous prime is 21517153745051. The next prime is 21517153745137. The reversal of 21517153745133 is 33154735171512.

It is not a de Polignac number, because 21517153745133 - 2⁹ = 21517153744621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21517153745137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23623078 + ... + 24517016.

It is an arithmetic number, because the mean of its divisors is an integer number (1804135404960).

Almost surely, 2^{21517153745133} is an apocalyptic number.

It is an amenable number.

21517153745133 is a deficient number, since it is larger than the sum of its proper divisors (7349012734227).

21517153745133 is a wasteful number, since it uses less digits than its factorization.

21517153745133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943328.

The product of its digits is 1323000, while the sum is 48.

The spelling of 21517153745133 in words is "twenty-one trillion, five hundred seventeen billion, one hundred fifty-three million, seven hundred forty-five thousand, one hundred thirty-three".