20101287424 has 160 divisors (see below), whose sum is σ = 45064213920. Its totient is φ = 8901623808.

The previous prime is 20101287413. The next prime is 20101287439. The reversal of 20101287424 is 42478210102.

It is a super-2 number, since 2×20101287424² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32578764 + ... + 32579380.

It is an arithmetic number, because the mean of its divisors is an integer number (281651337).

Almost surely, 2^20101287424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20101287424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22532106960).

20101287424 is an abundant number, since it is smaller than the sum of its proper divisors (24962926496).

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

20101287424 is a wasteful number, since it uses less digits than its factorization.

20101287424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

Adding to 20101287424 its reverse (42478210102), we get a palindrome (62579497526).

The spelling of 20101287424 in words is "twenty billion, one hundred one million, two hundred eighty-seven thousand, four hundred twenty-four".