20551424024 has 64 divisors (see below), whose sum is σ = 41252716800. Its totient is φ = 9569729664.

The previous prime is 20551423987. The next prime is 20551424029. The reversal of 20551424024 is 42042415502.

It is a super-2 number, since 2×20551424024² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20551424029) 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, 5670677 + ... + 5674299.

It is an arithmetic number, because the mean of its divisors is an integer number (644573700).

Almost surely, 2^20551424024 is an apocalyptic number.

It is an amenable number.

20551424024 is an abundant number, since it is smaller than the sum of its proper divisors (20701292776).

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

20551424024 is a wasteful number, since it uses less digits than its factorization.

20551424024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4272 (or 4268 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 20551424024 its reverse (42042415502), we get a palindrome (62593839526).

The spelling of 20551424024 in words is "twenty billion, five hundred fifty-one million, four hundred twenty-four thousand, twenty-four".