20424531215 has 8 divisors (see below), whose sum is σ = 26737568208. Its totient is φ = 14854204480.

The previous prime is 20424531203. The next prime is 20424531217. The reversal of 20424531215 is 51213542402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20424531215 - 2¹⁶ = 20424465679 is a prime.

It is a super-2 number, since 2×20424531215² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424531217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185677502 + ... + 185677611.

It is an arithmetic number, because the mean of its divisors is an integer number (3342196026).

Almost surely, 2^20424531215 is an apocalyptic number.

20424531215 is a deficient number, since it is larger than the sum of its proper divisors (6313036993).

20424531215 is a wasteful number, since it uses less digits than its factorization.

20424531215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371355129.

The product of its (nonzero) digits is 9600, while the sum is 29.

The spelling of 20424531215 in words is "twenty billion, four hundred twenty-four million, five hundred thirty-one thousand, two hundred fifteen".