20424736512 has 54 divisors (see below), whose sum is σ = 58889557272. Its totient is φ = 6808244736.

The previous prime is 20424736459. The next prime is 20424736543. The reversal of 20424736512 is 21563742402.

It is a super-2 number, since 2×20424736512² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4430148 + ... + 4434755.

Almost surely, 2^20424736512 is an apocalyptic number.

It is an amenable number.

20424736512 is an abundant number, since it is smaller than the sum of its proper divisors (38464820760).

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

20424736512 is an equidigital number, since it uses as much as digits as its factorization.

20424736512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8864925 (or 8864908 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 20424736512 in words is "twenty billion, four hundred twenty-four million, seven hundred thirty-six thousand, five hundred twelve".