20745217024 has 99 divisors (see below), whose sum is σ = 48315957147. Its totient is φ = 8876980224.

The previous prime is 20745217007. The next prime is 20745217027. The reversal of 20745217024 is 42071254702.

The square root of 20745217024 is 144032.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20745217027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 32262847 + ... + 32263489.

Almost surely, 2^20745217024 is an apocalyptic number.

20745217024 is the 144032-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20745217024

20745217024 is an abundant number, since it is smaller than the sum of its proper divisors (27570740123).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20745217024 is an frugal number, since it uses more digits than its factorization.

20745217024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 34.

The spelling of 20745217024 in words is "twenty billion, seven hundred forty-five million, two hundred seventeen thousand, twenty-four".